Robes expanding to disguise fat (5)
I believe the answer is:
obese
'fat' is the definition.
(similar in meaning)
'robes expanding to disguise' is the wordplay.
'OBESE' is hidden within the letters.
But, I am not sure how this is indicated.
Can you help me to learn more?
(Other definitions for obese that I've seen before include "Morbidly fat" , "Plump" , "Enormously portly" , "Having excessive girth" , "Carrying far too much weight" .)