As a unit, Wolves press forwards (4)
I believe the answer is:
pack
I believe this is a triple definition!
'as a unit wolves' is the first definition.
(pack of wolves)
'press' is the second definition.
(thesaurus)
'forwards' is the third definition.
(rugby term)
(Other definitions for pack that I've seen before include "Fill luggage - wolves" , "Wolf group" , "Fill (a suitcase)" , "Stow" , "Group of scouts" .)