Crossword Genius

Chosen exam about system of appointing MPs? (9)

Ross

I believe the answer is:

electoral

I'm a little stuck... Click here to teach me more about this clue!

'system of appointing mps?' is the definition.
I can't tell whether this definition defines the answer.

'chosen exam' is the wordplay.
'chosen' becomes 'elect' ('elect' as an adjective can mean chosen).
'exam' becomes 'oral' (spoken academic test).
'elect'+'oral'='ELECTORAL'

'about' acts as a link.

Can you help me to learn more?

(Other definitions for electoral that I've seen before include "of constituents" , "Relating to the voting system" , "one kind of college" , "List of voters" , "concerning voters" .)

I've seen this clue in The Times.
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