Restless Cooler King escapes totally exhausted (7)

I believe the answer is:

fidgety

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'restless' is the definition.
(synonyms)

'cooler king escapes totally exhausted' is the wordplay.
'cooler king escapes' becomes 'fidge' (I can't explain this - if you can you should give a lot more credence to this answer).
'exhausted' means to remove the middle letters (the word is emptied out or exhausted).
'totally' with its middle removed is 'ty'.
'fidge'+'ty'='FIDGETY'

Can you help me to learn more?

(Other definitions for fidgety that I've seen before include "Agitated, restless" , "Making a fuss" , "Nervous and unable to relax" , "Nervously moving" .)

I've seen this clue in The Guardian.

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