Lacking imagination (7)

I think it could be either:

Which length description are you looking for?:

prosaic

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

This is the entire clue.

(Other definitions for prosaic that I've seen before include "boring!" , "Humdrum" , "Matter-of-fact" , "Dull -- commonplace" , "Hackneyed" .)

I've seen this clue in The Independent and the Sydney Morning Herald.

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