Shakespeare, it seems, was wrong about Romeo! (4)
I believe the answer is:
bard
'shakespeare' is the definition.
(I've seen this before)
'wrong about romeo' is the wordplay.
'wrong' becomes 'bad' ().
'about' is an insertion indicator.
'romeo' becomes 'R' (phonetic alphabet: alpha, bravo, charlie etc.).
'bad' placed around 'r' is 'BARD'.
'it seems was' acts as a link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for bard that I've seen before include "Eisteddfod winner" , "Poet; sounds like forbidden" , "Ancient poet" , "Celtic poet" , "Traditional poet" .)