Grand room providing storage above yard (5)
I believe the answer is:
lofty
'grand' is the definition.
(thesaurus)
'room providing storage above yard' is the wordplay.
I cannot really see how this works, but
'room' could be 'loft' (I've seen this before) and 'loft' is found within the answer.
'yard' could be 'y' and 'y' is found in the answer.
No letters remain.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for lofty that I've seen before include "Such ideals" , "Soaring" , "Eminent" , "Tall, arrogant" , "Of majestic height" .)