Crossword Genius

Curious numbers close to infinity (4)

Ross

I believe the answer is:

nosy

'curious' is the definition.
('nosy' can be similar in meaning to 'curious')

'numbers close to infinity' is the wordplay.
'numbers' becomes 'nos' (no. is a kind of number**).
'close to' suggests the final letters (the close/ending of).
The final letter of 'infinity' is 'y'.
'nos'+'y'='NOSY'

(Other definitions for nosy that I've seen before include "Fragrant" , "Showing too much curiosity about people's affairs" , "lots of questions" , "Meddlesome" , "Inquisitive in nasal manner" .)

I've seen this clue in The Independent.
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