Small deer (3)

I think it could be either:

Which length description are you looking for?:

roe

'small deer' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for roe that I've seen before include "shy animal" , "If hard, eggs" , "Part of fish, sounds like go through water" , "Hoofed animal(s)" , "eg Caviare" .)

I've seen this clue in The Mirror and the Penny Press.

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