Fat covered by bathrobes easily (5)
I believe the answer is:
obese
'fat' is the definition.
(similar in meaning)
'covered by bathrobes easily' is the wordplay.
'covered by' indicates the answer is hidden within the clue.
'OBESE' is hidden in the letters of 'bathrobes easily'.
(Other definitions for obese that I've seen before include "Excessively fat" , "Grossly fat" , "Extremely portly" , "Unusually fat" , "Falstaffian" .)