Tiny amount of trifle (5,6)

'trifle' is the definition.
I don't know anything about this answer so I can't judge whether this works.

'tiny amount' is the wordplay.
I cannot really see how this works, but
'tiny' could be 'small' (similar in meaning) and 'small' is located in the answer.
'amount' could be 'ma' (mA is a kind of amount) and 'ma' is found within the answer.
This may be the basis of the clue (or it may be nonsense).

'of' acts as a link.

Can you help me to learn more?