Crossword Genius

Come down and stay put, idiot! (8)

Ross

I believe the answer is:

dipstick

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'idiot' is the definition.
(informal term for a stupid person)

'come down and stay' is the wordplay.
'come down' becomes 'dip' (I am not sure about this - if you are sure you should believe this answer much more).
'and' says to put letters next to each other.
'stay' becomes 'stick' (synonyms).
'dip'+'stick'='DIPSTICK'

'put' is the link.

Can you help me to learn more?

(Other definitions for dipstick that I've seen before include "Rod used to measure oil level in car" , "Idiot" , "Engine oil measuring device" , "Rod for measuring depth of liquid contents" , "Wally" .)

I've seen this clue in The Telegraph.
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