Slowing down quietly during dance music from the 90s (7)

I haven't cracked this one yet — but the brilliant team at Fifteensquared have:

RIT (in musical notation, abbreviation for ritardando = Italian for slowing down) + P (in musical notation, abbreviation for piano = Italian for quietly), all inserted into BOP (slang for dance). Confusingly, rit. is also an abbreviation for ritenuto (held back), which is more of a temporary just-go-a-bit-slower-here rather than a gradual slowing down. If in doubt, watch the conductor! British pop music genre from the 1990s.