A room for a trophy (5)
I believe the answer is:
award
'trophy' is the definition.
(I've seen this in another clue)
'a room for a' is the wordplay.
'a room' becomes 'ward' (I've seen this before).
'for' says to put letters next to each other (I've seen this in other clues).
'ward' after 'a' is 'AWARD'.
(Other definitions for award that I've seen before include "Prize or other mark of recognition" , "Grant, confer" , "Prize in recognition of achievement" , "E.g. Oscar" , "Gong (informal)" .)