Food item held by parvenu: trim entryist (9)

I believe the answer is:

nutriment

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'food' is the definition.
(I know that nutriment is a type of food)

'held by parvenu trim entryist' is the wordplay.
'held by' indicates a hidden word.
'NUTRIMENT' is hidden within 'parvenu trim entryist'.

'item' is the link.
This may not be right. It may be part of another bit of the clue.

Can you help me to learn more?

(Other definitions for nutriment that I've seen before include "Nourishing food" , "diet" , "It sustains" , "Material providing food" , "Sustenance, nourishment" .)

I've seen this clue in The Sun.

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