Primate with unusual dance (4,4)
I believe the answer is:
time warp
'dance' is the definition.
(I've seen this before)
'primate with unusual' is the wordplay.
'with' becomes 'w' (short for with).
'unusual' is an anagram indicator.
'primate'+'w'='primatew'
'primatew' is an anagram of 'TIME WARP'.
(Other definitions for time warp that I've seen before include "In science fiction, a discontinuous period" , "Where past conditions are preserved intact" , "Hypothetical discontinuity in the fourth dimension?" , "Hypothetical distortion of the fourth dimension" , "Imaginary distortion of space which allows travel to different periods" .)