Footwear in fire (4)
I believe the answer is:
boot
I believe this is a double definition.
'footwear' is the first definition.
(boot is a kind of footwear)
'fire' is the second definition.
(I've seen this in another clue)
'in' is the link.
(Other definitions for boot that I've seen before include "eg Wellington" , "Amass and hide away" , "Car luggage space; kick" , "may be packed for a journey" , "Stout shoe" .)