Cheerful food outlet (7)
I believe the answer is:
chipper
'cheerful' is the definition.
(similar in meaning)
'food outlet' is the wordplay.
I cannot really see how this works, but
'food' could be 'chip' (chip is a kind of food) and 'chip' is present in the answer.
The remaining letters 'per' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for chipper that I've seen before include "worker in fast-food outlet?" , "Happy" , "type involved in 6 [CARPENTERING] ?" , "Smartly-dressed" , "full of beans" .)