Crossword Genius

Support friend in lawful manner (7)

Ross

I believe the answer is:

legally

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'lawful manner' is the definition.
The answer and definition are not the same part of speech.

'support friend' is the wordplay.
'support' becomes 'leg' (leg is a kind of support).
'friend' becomes 'ally' (synonyms).
'leg'+'ally'='LEGALLY'

'in' acts as a link.

Can you help me to learn more?

(Other definitions for legally that I've seen before include "according to the national regulations" , "without offence" , "As regards the law" , "within the law" , "In a manner approved by law" .)

I've seen this clue in the Sydney Morning Herald.
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