Small, a doctor attending a dance (5)
I believe the answer is:
samba
'dance' is the definition.
(sambaing is a kind of dancing)
'small a doctor attending a' is the wordplay.
'small' becomes 's' (abbreviation - e.g. clothes size).
'doctor' becomes 'mb' (Bachelor of Medicine, Medicinae Baccalaureus**).
'attending' is a charade indicator (letters next to each other).
's'+'a'+'mb'+'a'='SAMBA'
(Other definitions for samba that I've seen before include "it was launched in Brazil" , "This ambassador's > brisk steps" , "Dance, originally from Brazil" , "Dance music" , "Lively ballroom dance from Brazil" .)