Look at dance after a bit of needle (7)
I believe the answer is:
eyeball
'look at' is the definition.
(thesaurus)
'dance after a bit of needle' is the wordplay.
'dance' becomes 'ball' (ball is a kind of dance).
'after' means one lot of letters go next to another.
'a bit of needle' becomes 'eye' ('eye' is part of 'needle').
'ball' after 'eye' is 'EYEBALL'.
(Other definitions for eyeball that I've seen before include "making us stare" , "Look confrontationally" , "Observe closely" , "Closely examine" , "Label ye (anag)" .)