Coming into dance, rocker's rival shows style again (7)
I believe the answer is:
remodel
'style again' is the definition.
(I've seen this before)
'coming into dance rocker's rival' is the wordplay.
'coming into' is an insertion indicator.
'dance' becomes 'reel' (reel is a kind of dance).
'rocker's rival' becomes 'mod' (I've seen this in another clue).
'reel' enclosing 'mod' is 'REMODEL'.
'shows' acts as a link.
(Other definitions for remodel that I've seen before include "Produce new arrangement" , "Change the form of" , "Reconstruct, recast" , "Reshape" , "Make over" .)