Possibly learn as a team (7)
I believe the answer is:
arsenal
'a team' is the definition.
(Arsenal football club)
'possibly learn as' is the wordplay.
'possibly' indicates anagramming the letters.
'learn'+'as'='learnas'
'learnas' is an anagram of 'ARSENAL'.
(Other definitions for arsenal that I've seen before include "Premier League side founded by munitions workers in 1886" , "Military store for arms, ammunition etc" , "Place where guns and ammunition are stored" , "Ammunition store or English soccer team" , "Military structure for arms and ammunitions" .)