Crossword Genius

It's low down to begin with coercion from all sides. (13)

Ross

I believe the answer is:

underpressure

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

'it's low' is the definition.
I know nothing about this answer so I can't judge whether this works.

'down to begin with coercion from all sides' is the wordplay.
I cannot quite understand how this works, but
'down' could be 'under' (I've seen this before) and 'under' is present in the answer.
'coercion' could be 'pressure' (I've seen this before) and 'pressure' is found within the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

I've seen this clue in The Irish Times.
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