Drink gingerly (3)
I believe the answer is:
sip
'drink gingerly' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for sip that I've seen before include "Small mouthful of liquid" , "Drink gingerly" , "Small mouthful of fluid" , "Drink daintily" , "Take in slowly" .)