Food of love at first sight (4)
I believe the answer is:
oats
'food' is the definition.
(I know that oats is a type of food)
'of love at first sight' is the wordplay.
'of' indicates an anagram (the answer comes from or 'of' the letters).
'love' becomes 'o' (love means zero in tennis).
'first' says to put letters next to each other.
'sight' becomes 's' (this could be a standard abbreviation which I don't know about).
'o' after 'at' is 'ato'.
'ato' is an anagram of 'oat'.
'oat'+'s'='OATS'
Can you help me to learn more?
(Other definitions for oats that I've seen before include "Grains or porridge" , "Food for horses and Scots (said Dr Johnson)" , "Cereal grass and seeds" , "Seed grasses" , "Cereal food for horses" .)