Dunk in wadi, pinkies (3)
I believe the answer is:
dip
'dunk' is the definition.
(dipping is a kind of dunking)
'in wadi pinkies' is the wordplay.
'in' says the answer is hidden in the clue.
'DIP' is hidden within 'wadi pinkies'.
(Other definitions for dip that I've seen before include "Lower into water for short swim" , "Lower into liquid" , "may be lucky at the fete?" , "Sink downwards" , "Sink; brief swim" .)