Wolf in close up (4)
I believe the answer is:
bolt
This clue is a double definition.
'wolf' is the first definition.
(both can mean to eat something)
'close up' is the second definition.
(thesaurus)
'in' acts as a link.
(Other definitions for bolt that I've seen before include "Flee with door-locking device" , "A . . . . from the blue is a complete surprise" , "From the blue, it's a great surprise" , "Sprint? Yes he does!" , "Eat hurriedly" .)