Clock generation on FPGA pin
One way or another your FPGA will need some kind of reference clock to work. The DAC performance will of course be influenced by the quality of its own clock.

If you use a good, low-jitter reference, the FPGA can make very good clocks using its internal PLL synthesizer block (verify this with your specific FPGA.)

However, if carefully-controlled clock spectrum is paramount (and it can be for some RF applications), you can use an external clock synth that has the spectral profile your DAC needs to achieve its performance. Choose a synth with two outputs: one for the FPGA, and one for the DAC. TI makes some good ones.