Popular culture of the 1980s, in spring (3-3)
I believe the answer is:
hip-hop
'popular culture of the 1980s' is the definition.
'in spring' is the wordplay.
'in' becomes 'hip' (both can mean fashionable).
'spring' becomes 'hop' (hopping is a kind of springing).
'hip'+'hop'='HIP-HOP'
(Other definitions for hip-hop that I've seen before include "Electronic rap music" , "Popular music style" , "Genre of 1980s and '90s African-American music" , "Pop. music movement" .)