A star led by stud in dance (5,4)
I believe the answer is:
bossa nova
'dance' is the definition.
(I've seen this before)
'a star led by stud' is the wordplay.
'star' becomes 'nova' (nova is a kind of star).
'led by' says to put letters next to each other.
'stud' becomes 'boss' (synonyms).
'a'+'nova'='anova'
'anova' after 'boss' is 'BOSSA NOVA'.
'in' is the link.
(Other definitions for bossa nova that I've seen before include "Brazilian music, rhythmically related to the samba" , "Brazil's measure" , "Dance from Brazil similar to samba" , "steps taken" , "(Music for) a Brazilian dance" .)