Reduce pressure and scrub round (7)
I believe the answer is:
deplete
'reduce' is the definition.
(I've seen this before)
'pressure and scrub round' is the wordplay.
I cannot quite see how this works, but
'pressure' could be 'p' (abbreviation) and 'p' is found within the answer.
'scrub' could be 'delete' (I've seen this before) and 'delete' is present in the leftover letters.
This accounts for all the letters.
This explanation may well be incorrect...
(Other definitions for deplete that I've seen before include "Reduce (a stock)" , "Reduce (stocks)" , "Drain" , "Empty, reduce, exhaust" , "Use up resources of" .)