If there's one left for me, I'll eat it (4)
I believe the answer is:
meal
'i'll eat it' is the definition.
I can't tell whether this defines the answer.
'if there's one left for me' is the wordplay.
'if' becomes 'l' (I can't justify this - if you can you should give a lot more credence to this answer).
'there's' says to put letters next to each other.
'one' becomes 'a' (a thing is one thing).
'left' shows that the letters should be reversed in order.
'for' means one lot of letters go next to another (I've seen this in other clues).
'l'+'a'='la'
'la' written backwards gives 'al'.
'al' after 'me' is 'MEAL'.
Can you help me to learn more?
(Other definitions for meal that I've seen before include "Food for male" , "Eg, dinner or tea" , "Breakfast, dinner or supper" , "Supper, e.g." , "Scoff" .)