A room for trophy (5)
I believe the answer is:
award
'trophy' is the definition.
(I've seen this in another clue)
'a room' is the wordplay.
'room' becomes 'ward' (I've seen this before).
'a'+'ward'='AWARD'
'for' acts as a link.
(Other definitions for award that I've seen before include "settlement" , "Give, grant" , "They are disinclined to work" , "Perhaps Tony" , "Honour, accolade." .)