Feline and little piggies guzzling a fruit of the vine (8)
I believe the answer is:
tomatoes
'fruit of the vine' is the definition.
'tomatoes' can be an answer for 'fruit' (I've seen this before). I'm not certain of the 'of the vine' bit.
'feline and little piggies guzzling a' is the wordplay.
'feline' becomes 'tom' (tom is a kind of feline).
'and' means one lot of letters go next to another.
'little piggies' becomes 'toes' ('this little piggy' nursery rhyme).
'guzzling' is an insertion indicator (I've seen this in other clues).
'tom'+'toes'='tomtoes'
'tomtoes' enclosing 'a' is 'TOMATOES'.
Can you help me to learn more?
(Other definitions for tomatoes that I've seen before include "Salad fruits" , "They go well with basil and mozzarella" , "Ta to some for the odd salad ingredients" , "Glossy red fruits eaten as vegetable" , "Love apples" .)