Return incomprehensible motel menu (9)
I believe the answer is:
emolument
'return' is the definition.
(an emolument is a financial return)
'incomprehensible motel menu' is the wordplay.
'incomprehensible' indicates an anagram (an incomprehensible jumbling of the letters).
'motel'+'menu'='motelmenu'
'motelmenu' is an anagram of 'EMOLUMENT'.
(Other definitions for emolument that I've seen before include "payment" , "Compensation paid" , "profit results" , "A fee received, salary" , "Profit of employment" .)