Advance on two men for not meeting standards (9)

I believe the answer is:

subnormal

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'not meeting standards' is the definition.
I can't tell whether this definition defines the answer.

'advance on two men' is the wordplay.
'advance' becomes 'sub' (both can mean a loan).
'on two men' becomes 'normal' (I can't explain this - if you can you should believe this answer much more).
'sub'+'normal'='SUBNORMAL'

'for' acts as a link.

Can you help me to learn more?

(Other definitions for subnormal that I've seen before include "not being over-bright" , "Of low intelligence" .)

I've seen this clue in The Daily Express.

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