Sally, also Fay, concealing her love for Romeo (5)
I believe the answer is:
foray
'sally' is the definition.
(I've seen this in another clue)
'fay concealing her love for romeo' is the wordplay.
I cannot quite see how this works, but
'her' could be 'ray' and 'ray' is found in the answer.
'love' could be 'o' (love means zero in tennis) and 'o' is found in the answer.
A single letter 'f' remains which might be clued in a way I don't see.
This explanation may well be incorrect...
'also' acts as a link.
Can you help me to learn more?
(Other definitions for foray that I've seen before include "Raid or incursion" , ".A sudden attack or raid" , "Raid into enemy territory" , "Raid for plunder" , "Sortie" .)