Joyful number hugging remainder heading off (7)
I believe the answer is:
festive
'joyful' is the definition.
(I've seen this before)
'number hugging remainder heading off' is the wordplay.
'number' becomes 'five' (five is a kind of number).
'hugging' indicates putting letters inside.
'remainder' becomes 'rest' (synonyms).
'heading off' means to remove the first letter.
'rest' with its initial letter taken off is 'est'.
'five' placed around 'est' is 'FESTIVE'.
(Other definitions for festive that I've seen before include "Gay" , "Merry" , "Offering fun and gaiety" , "Christmassy" , "Jolly" .)