Lacking flavour (7)

I think it could be either:

Which length description are you looking for?:

insipid

'lacking flavour' is the definition.
(I've seen this before)

This is all the clue.

(Other definitions for insipid that I've seen before include "Jejune" , "Bland, flavourless" , "Lacking flavour or banal" , "Lacking taste or flavour" , "Wishy-washy" .)

I've seen this clue in The Sun, The Telegraph and The Times.

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