What are some of these "high-level" instructions found in CISC architectures?
I know of two main aspects of complex instructions.


addressing modes.  There are two sub-aspects here: 


RISC tend to be load/store machines (that this the only instructions which access memory are those whose sole goal is that access), CISC tend to allow operands to be in memory and to be accessible with a variety of addressing modes.  When each operand can have an independent addressing mode like on the VAX, that make the instruction complex.
the addressing modes of CISC tend to be more complex than those of RISC.  When, like the PDP-10, the number of memory access needed to determine the true operand is unbounded, it makes the instruction complex.

the instructions themselves. That's what you are probably thinking about. Setup of complex stack frames with automatic saving of registers, which register to be saved being determined by a bitmap (see VAX) and other complex context switching state mechanism (see 80386 task gate or whatever their name is), polynomial evaluation (see VAX), insertion in a linked list (I don't remember where I've seen that and don't want to dig it out, VAX and PDP-10 are candidates), it is folklore (I don't know how true it is) that some machines in the IBM 360 family had instructions who where designed for the only usage of  improving their Cobol library sorting function.


I think they all can be regrouped with one characteristic: complex instructions are those who need to do a relatively large (and I'd not argue strongly against defining large as being greeter than one), sometimes variable number of memory accesses.  That characteristic brings true nightmare:


you need a relatively complex state machine to handle them, and to decide how to handle interrupts during the time they execute;
you need to be handle multiple page fault (in simple instruction you have two: one for the instruction, one for the data memory) which means that they may be interrupted and resumed for internal reasons several times, making the first issue more important.