Gratify, spoil (7)
I believe the answer is:
indulge
I believe this clue is a double definition.
'gratify' is the first definition.
(I know that gratify can be written as indulge)
'spoil' is the second definition.
(I know that spoil can be written as indulge)
(Other definitions for indulge that I've seen before include "Gratify, spoil" , "Humour; spoil" , "Satisfy (a desire)" , "Drink too much" , "Yield to the wishes of" .)