Woolly I pressed should be separate (8)
I believe the answer is:
disperse
'separate' is the definition.
(dispersing is a kind of separating)
'woolly i pressed' is the wordplay.
'woolly' indicates an anagram (I've seen this in other clues).
'i'+'pressed'='ipressed'
'ipressed' is an anagram of 'DISPERSE'.
'should be' is the link.
(Other definitions for disperse that I've seen before include "Scatter, break up" , "Broadcast" , "Presides so as to scatter" , "Thin out and disappear" , "Break up, move away from each other" .)