Celebrated ensemble enveloped in smoke that's excessive (7)
I believe the answer is:
fulsome
'excessive' is the definition.
(I've seen this before)
'celebrated ensemble enveloped in smoke' is the wordplay.
'celebrated ensemble' becomes 'lso' (I can't justify this - if you can you should give a lot more credence to this answer).
'enveloped in' means one lot of letters goes inside another.
'smoke' becomes 'fume' ('fume' can be a synonym of 'smoke').
'lso' put inside 'fume' is 'FULSOME'.
'that's' acts as a link.
Can you help me to learn more?
(Other definitions for fulsome that I've seen before include "Sickeningly obsequious" , "Excessively ingratiating - of mules (anag)" , "Nauseating" , "Excessively flattering (praise)" , "Adulatory" .)