Guards hat from worrying break-ins (8)
I believe the answer is:
bearskin
'guards hat' is the definition.
(hat worn by British Army guards)
'worrying break-ins' is the wordplay.
'worrying' indicates an anagram.
'break'+'ins'='breakins'
'breakins' anagrammed gives 'BEARSKIN'.
'from' acts as a link.
(Other definitions for bearskin that I've seen before include "Pelt" , "It covers soldier's head" , "military gear" , "piece of military uniform" , "Regimental helmet of black fur" .)