Garment in river after fire (6)
I believe the answer is:
blazer
'garment' is the definition.
(blazer is a kind of garment)
'river after fire' is the wordplay.
I cannot really see how this works, but
'river' could be 'r' (abbreviation) and 'r' is found in the answer.
'fire' could be 'blaze' (blaze is a kind of fire) and 'blaze' is present in the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
'in' is the link.
Can you help me to learn more?
(Other definitions for blazer that I've seen before include "Man's garment" , "coat?" , "Type of jacket for sports officials" , "First to trail" , "Loose-fitting jacket for school or team" .)