Brother leaves bomber's wreck for a broom (5)
I believe the answer is:
besom
'a broom' is the definition.
(besom is a kind of broom)
'brother leaves bomber's wreck' is the wordplay.
'brother' becomes 'br'.
'leaves' suggests deleting specific letters.
'wreck' is an anagram indicator.
'bombers' with 'br' removed is 'ombes'.
'ombes' with letters rearranged gives 'BESOM'.
'for' is the link.
(Other definitions for besom that I've seen before include "Sweeping item" , "I sweep" , "sweeper" , "Twig broom" , "Concoction of twigs" .)