Heads of armoured division make it their own (5)
I believe the answer is:
admit
'own' is the definition.
(thesaurus)
'heads of armoured division make it their' is the wordplay.
'heads of' indicates taking the first letters.
The first letters of 'armoured division make it their' is 'ADMIT'.
(Other definitions for admit that I've seen before include "Confess (to something)" , "Accept" , "permit to come in" , "Confess - acknowledge" , "Confess; allow in" .)