One's close enough, right? I start to become nervous (9)

I believe the answer is:

neighbour

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'one's close' is the definition.
Both the answer and definition are adjectives. Perhaps there's an association between them I don't understand?

'enough right? i start to become nervous' is the wordplay.
'right?' becomes 'r' (common abbreviation).
'start to' indicates taking the first letters.
'nervous' indicates an anagram (letters get shaken up).
The first letter of 'become' is 'b'.
'enough'+'r'+'i'+'b'='enoughrib'
'enoughrib' anagrammed gives 'NEIGHBOUR'.

Can you help me to learn more?

(Other definitions for neighbour that I've seen before include "possibly providing part of watch?" , "Such a one might help out" , "One living close by" , "Person living nearby" , "Nearby resident" .)

I've seen this clue in The Guardian.

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