Crossword Genius

Become prostrate: told untruths on own! (7)

Ross

I believe the answer is:

liedown

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'become prostrate' is the definition.
I know nothing about this answer so I cannot tell whether it can be defined by this definition.

'told untruths on own' is the wordplay.
'told untruths' becomes 'lied' (told lies).
'on' says to put letters next to each other (in a down clue, letters appear on others).
'lied'+'own'='LIEDOWN'

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I've seen this clue in The Irish Independent.
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