Spend recklessly (4)
I believe the answer is:
blow
'spend recklessly' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for blow that I've seen before include "Breathe hard" , "Use pipe for" , "force through pipe" , "Strong current of air" , "'..., ..., thou winter wind' (As You Like It)" .)