Crossword Genius

Son in jest out of control? (8)

Ross

I believe the answer is:

skidding

I'm a little stuck... Click here to teach me more about this clue!

'out of control?' is the definition.
(I've seen this before)

'son in jest' is the wordplay.
I cannot really see how this works, but
'son' could be 's' (genealogical abbreviation for son) and 's' is found in the answer.
'in' is found in the answer.
'jest' could be 'kid' (I've seen this in another clue) and 'kid' is found in the answer.
This explanation may well be incorrect...

Can you help me to learn more?

(Another definition for skidding that I've seen is " out of control".)

I've seen this clue in The Telegraph.
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