Trivial matters for vocal gold digger with military outfits (5,7)

I believe the answer is:

minor details

I'm a little stuck... Click here to teach me more about this clue!

'matters for vocal gold digger with military outfits' is the definition.
I know nothing about this answer so I can't judge whether this works.

'trivial' is the wordplay.
I cannot quite see how this works, but
'trivial' could be 'minor' (I've seen this before) and 'minor' is found within the answer.
The remaining letters 'details' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...

Can you help me to learn more?

I've seen this clue in the Irish Times and the Irish Times (Crosaire).

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