Crossword Genius

One tiny picture it is risky not to check? (3,5,5)

Ross

I believe the answer is:

the small print

'it is risky not to check?' is the definition.
(eg the small print on a contract must be checked)

'one tiny picture' is the wordplay.
'one' becomes 'the' (both can introduce a definite example of something).
'tiny' becomes 'small' (similar in meaning).
'picture' becomes 'print'.
'the'+'small'+'print'='THE SMALL PRINT'

(Another definition for the small print that I've seen is " Insurance details, perhaps".)

I've seen this clue in The Times.
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