Crossword Genius

To some extent a clever feeler (8)

Ross

I believe the answer is:

tentacle

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

'to some extent a clever' is the wordplay.
'to some' indicates a hidden word (some of the parts of the word are used).
'TENTACLE' is hidden within 'extent a clever'.

(Other definitions for tentacle that I've seen before include "Flexible grasping organ" , "Flexible appendage on some animals" , "Appendage as on octopus" , "Long flexible feeler" , "Flexible feeling organ" .)

I've seen this clue in The Telegraph.
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