Loves treats, at heart, but they consume too many (7)
I believe the answer is:
overeat
'loves treats at heart' is the definition.
I can't tell whether this defines the answer.
'they consume too many' is the wordplay.
I cannot really understand how this works, but
'consume' could be 'eat' (to consume something is to eat it) and 'eat' is found in the answer.
'too many' could be 'over' (I've seen this in other clues) and 'over' is present in the answer.
This accounts for all the letters.
This explanation may well be incorrect...
'but' acts as a link.
Can you help me to learn more?
(Other definitions for overeat that I've seen before include "Binge" , "Stuff oneself silly" , "Gorge oneself" , "Be gluttonous" , "Be greedy" .)