Family member removing top in high spirits (7)
I believe the answer is:
elation
'high spirits' is the definition.
(synonyms)
'family member removing top' is the wordplay.
'family member' becomes 'relation' (a relation or relative).
'removing top' means to remove the first letter.
'relation' with its initial letter removed is 'ELATION'.
'in' acts as a link.
(Other definitions for elation that I've seen before include "Toenail (anag) -- delight" , "Great happiness and exhilaration" , "Feeling of joy from toenail" , "exhibits successful pride" , "State of being delighted or proud" .)