Spanish cheer during little brother's dance (6)
I believe the answer is:
bolero
'dance' is the definition.
(bolero is a kind of dance)
'spanish cheer during little brother's' is the wordplay.
'spanish cheer' becomes 'ole' (I've seen this before).
'during' means one lot of letters goes inside another.
'little brother' becomes 'bro'.
'ole' placed within 'bro' is 'BOLERO'.
(Other definitions for bolero that I've seen before include "Famous Ravel work" , "short jacket is required here" , "Short jacket or music for Spanish dance" , "Kind of jacket or dramatic music by Ravel" , "Short open jacket - Ravel composition" .)