Surfing need (4)
I believe the answer is:
wave
'surfing need' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for wave that I've seen before include "Hand gesture -- hair feature" , "60s cinematic movement with 1a [NEW]" , "roller, perhaps" , "Roller, move to and fro" , "Move hand in farewell" .)