Notice love is a great bother (3)
I believe the answer is:
ado
'great bother' is the definition.
'ado' can be an answer for 'bother' (both can mean fuss or commotion). I'm not sure about the 'great' bit.
'notice love' is the wordplay.
'notice' becomes 'ad' (short for advert).
'love' becomes 'o' (love means zero in tennis).
'ad'+'o'='ADO'
'is a' is the link.
Can you help me to learn more?
(Other definitions for ado that I've seen before include "hoo-hah" , "Nothing caused much around 1598" , "carry-on" , "Song and dance" , "'Much ... About Nothing, Shakespeare play (3)'" .)