Admit it's different now (3)
I believe the answer is:
own
'admit' is the definition.
(own can mean to admit or acknowledge)
'different now' is the wordplay.
'different' indicates anagramming the letters (letters placed in a different order).
'now' anagrammed gives 'OWN'.
'it's' is the link.
(Other definitions for own that I've seen before include "Posses" , "Private" , "Allow" , "Have in one's possession" , "Possess - recognise - admit" .)