It's popular with those employed in the finance business or concerns that don't give you confidence (12)

I believe the answer is:

insecurities

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

'those employed in the finance business or concerns that don't give you confidence' is the definition.
I can't judge whether this definition defines the answer.

'it's popular' is the wordplay.
I cannot really see how this works, but
'it's' could be 'es' ('e' can mean 'electronic' which is similar to 'IT') and 'es' is located in the answer.
'popular' could be 'in' ('in' can mean trendy) and 'in' is present in the answer.
This explanation may well be incorrect...

'with' acts as a link.

Can you help me to learn more?

I've seen this clue in The Irish Times.

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