Crossword Genius

One member takes it to be a proper abbreviation (5)

Ross

I believe the answer is:

legit

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'be a proper abbreviation' is the definition.
The definition suggests a singular noun which matches the answer.

'one member takes it' is the wordplay.
'one member' becomes 'leg' (member can mean a limb).
'takes' is a charade indicator (letters next to each other).
'leg'+'it'='LEGIT'

'to' acts as a link.

Can you help me to learn more?

(Other definitions for legit that I've seen before include "Above board (abbr)" , "Lawful, in short" , "Authorised" , "ok!" , "acceptable" .)

I've seen this clue in the Evening Standard.
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