What is the standard report when pilots exiting and clearing the runway
Nitpick: that would be runway 07, not runway 7

The phraseology is mostly standardised, and in general consists of notifying the relevant unit that you have vacated the runway. At a small, GA airfield with AFIS in the UK the typical communication goes as follows.


  ATCO: G-ABCD Cleared to land Runway 07, wind 240 at 5
  G-ABCD: Cleared to land, Runway 07. G-ABCD
  ... controlled crash ....
  G-ABCD: Runway vacated at Charlie  


This becomes a bit more formal at controlled airfields. In the UK, Cap 413 is the radio telephony communications bible. Secion 4.89 "Runway Vacating and Communicating after Landing" is the part you'e interested in. The communications would be more along the lines of (Note: CAP413 uses the name "Kennington" as a fictitious airport)


  Kennington Tower: BIGJET 347, vacate left
  BIGJET 347: Vacate left BIGJET 347
  Kennington Tower: BIGJET 347, when vacated contact Ground 118.350
  BIGJET 347: When vacated Ground 118.350, BIGJET 347
  BIGJET 347: Kennington Ground, BIGJET 347, runway vacated
  Kennington Ground: BIGJET 347, Kennington Ground, taxi to Stand 27 via taxiway Alpha