Statuary: it ain’t oddly, depicting reptile (7)
I believe the answer is:
saurian
'reptile' is the definition.
(I know that saurian is a type of diapsid)
'statuary it ain't oddly' is the wordplay.
'oddly' means one should take alternating letters (letters in the odd-numbered positions are used).
'statuary'+'it'+'aint'='statuaryitaint'
The alternating letters of 'statuaryitaint' are 'SAURIAN'.
'depicting' acts as a link.
I've seen this clue in The Times.
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