Crossword Genius

It identifies member and group (7)

Ross

I believe the answer is:

armband

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'it' is the definition.
The definition suggests a singular noun which matches the answer.

'member and group' is the wordplay.
'member' becomes 'arm' (member can mean a limb).
'and' is a charade indicator (letters next to each other).
'group' becomes 'band' (band can mean a group of people).
'arm'+'band'='ARMBAND'

'identifies' is the link.

Can you help me to learn more?

(Other definitions for armband that I've seen before include "Swimming aid" , "Worn by football captain or mourner" , "It signals captain" , "augmentation to uniform" , "Something worn around sleeve" .)

I've seen this clue in The Sun.
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