Unable to decide if it’s damaged (4)
I believe the answer is:
torn
This clue is a double definition.
'unable to decide' is the first definition.
(I've seen this in another clue)
'it's damaged' is the second definition.
(similar in meaning)
'if' is the link.
(Other definitions for torn that I've seen before include "Ripped - undecided" , "Removed forcibly" , "Lacerated - in two minds" , "Ragged" , "'-- Curtain', 1966 Hitchcock film" .)