Fellow loves putting extra heart into leading tea dance (7)
I believe the answer is:
foxtrot
'dance' is the definition.
(foxtrot is a kind of dance)
'fellow loves putting extra heart into leading tea' is the wordplay.
'fellow' becomes 'f' (abbreviation - of a society etc.).
'loves putting' becomes 'oo' (I can't justify this - if you can you should give a lot more credence to this answer).
'heart' indicates the central letters.
'into' is an insertion indicator.
'leading' indicates taking the first letters.
The middle of 'extra' is 'xtr'.
The initial letter of 'tea' is 't'.
'oo' enclosing 'xtr' is 'oxtro'.
'f'+'oxtro'+'t'='FOXTROT'
(Other definitions for foxtrot that I've seen before include "Lively ballroom dance" , "Ballroom dance in quadruple time" .)