Go ape? (4,3)
I believe the answer is:
take off
This clue is a double definition.
'go' is the first definition.
(I know that take off is a more specific form of the action go)
'ape?' is the second definition.
(thesaurus)
(Other definitions for take off that I've seen before include "Mimic - leave the ground" , "Skit" , "Burlesque" , "Act of mimicry" , "Doff" .)