Crossword Genius

Tough job for upright member on board (5,4)

Ross

I believe the answer is:

stern post

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'upright member on board' is the definition.
I know nothing about this answer so I cannot tell whether it can be defined by this definition.

'tough job' is the wordplay.
'tough' becomes 'stern' (both can mean strict or severe).
'job' becomes 'post' (post is a kind of job).
'stern'+'post'='STERN-POST'

'for' is the link.

Can you help me to learn more?

(Another definition for stern post that I've seen is " supporter on board".)

I've seen this clue in The Hindu.
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