Take a look at cutter set up over colliery, say (7)
I believe the answer is:
examine
'take a look at' is the definition.
(synonyms)
'cutter set up over colliery say' is the wordplay.
'cutter' becomes 'axe' (something which cuts).
'set up' shows that the letters should be reversed in order.
'over' means one lot of letters go next to another.
'colliery say' becomes 'mine' (a colliery is a coal mine).
'axe' backwards is 'exa'.
'exa'+'mine'='EXAMINE'
(Other definitions for examine that I've seen before include "Subject to inspection" , "Formally question (law)" , "Check" , "Question closely" , "Look closely at < test" .)