Lunch slice outside a square in Italy (6)
I believe the answer is:
piazza
'square in italy' is the definition.
'piazza' can be an answer for 'square' (synonyms). I am not certain of the 'in italy' bit.
'lunch slice outside a' is the wordplay.
'lunch slice' becomes 'pizza' (I've seen this in another clue).
'outside' is an insertion indicator (some letters go outside others).
'pizza' placed around 'a' is 'PIAZZA'.
Can you help me to learn more?
(Other definitions for piazza that I've seen before include "3 down" , "Where Italians may gather" , "Public square in Italian town" .)