Forbid Juliet's love for music maker (5)
I believe the answer is:
banjo
'music maker' is the definition.
(banjo is a kind of musical instrument)
'forbid juliet's love' is the wordplay.
'forbid' becomes 'ban' (banning is a kind of forbiding).
'juliet' becomes 'J' (phonetic alphabet: alpha, bravo, charlie etc.).
'love' becomes 'o' (love means zero in tennis).
'ban'+'j'+'o'='BANJO'
'for' acts as a link.
(Other definitions for banjo that I've seen before include "Instrument with long neck and round body" , "something that's played on" , "Long-necked instrument" , "strumming instrument" , "Guitar-like instrument" .)