Chap tucking into fleshy fruit is primarily manifesting piggishness (11)

'piggishness' is the definition.
Both the definition and answer are singular nouns.
Perhaps they are linked in a way I don't understand?

'chap tucking into fleshy fruit is primarily' is the wordplay.
I cannot really understand how this works, but
'chap' could be 'man' (chap can mean a man) and 'man' is present in the answer.
'fruit' could be 'gourd' (gourd is a kind of fruit) and 'gourd' is present in the leftover letters.
'is' is present in the answer.
A single letter 'm' remains which might be clued in a way I don't see.
This explanation may well be incorrect...

'manifesting' acts as a link.

Can you help me to learn more?