New gear sent for officer (8)
I believe the answer is:
sergeant
'officer' is the definition.
(sergeant is a kind of officer)
'new gear sent' is the wordplay.
'new' indicates anagramming the letters.
'gear'+'sent'='gearsent'
'gearsent' anagrammed gives 'SERGEANT'.
'for' is the link.
(Other definitions for sergeant that I've seen before include "Man in charge" , "Reagents (anag)" , "CARRY ON FILM" , "Army rank" , "one with stripes" .)