Dance doctor held in Rugby area (5)
I believe the answer is:
rumba
'dance' is the definition.
(rumba is a kind of dance)
'doctor held in rugby area' is the wordplay.
'doctor' becomes 'mb' (Bachelor of Medicine, Medicinae Baccalaureus).
'held in' indicates putting letters inside.
'rugby' becomes 'ru'.
'area' becomes 'a' (maths abbreviation).
'ru'+'a'='rua'
'mb' put inside 'rua' is 'RUMBA'.
(Other definitions for rumba that I've seen before include "Umbra (anag)" , "Cuban folk-dance" , "Caribbean dance" , "Latin beat" , "Lively Cuban dance" .)