Love to interrupt endlessly stroppy dancers (7)
I believe the answer is:
bolshoi
'dancers' is the definition.
(I've seen this before)
'love to interrupt endlessly stroppy' is the wordplay.
'love' becomes 'o' (In tennis, 'love' means 'zero').
'to interrupt' means one lot of letters goes inside another.
'endlessly' means to remove the last letter.
'stroppy' becomes 'bolshie'.
'bolshie' with its last letter removed is 'bolshi'.
'o' placed inside 'bolshi' is 'BOLSHOI'.
(Other definitions for bolshoi that I've seen before include "Moscow's ballet" , "dancers" , "Russian ballet company" , "Famous Moscow ballet company" , "Great Moscow ballet company" .)