Guessing game (1-3)

I think it could be either:

Which length description are you looking for?:

1-3

i-spy

'guessing game' is the definition.
(I've seen this before)

This is the entire clue.

(Other definitions for i-spy that I've seen before include "Child's guessing game" , "Children's guessing game" , ". ... with my little eye (children's game)" , "Child's game: ''. ... with my little eye'" , "Children's alphabet game" .)

I've seen this clue in The Mirror and the Evening Standard.

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