Character turning up with cops at the King's Head (5)

I believe the answer is:

spock

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'character turning' is the definition.
The definition suggests a singular noun which matches the answer.

'up with cops at the king's head' is the wordplay.
'up with' says the letters should be written backwards (move letters in down clue up).
'at' is a charade indicator (letters next to each other).
'head' indicates taking the first letters.
The first letter of 'kings' is 'k'.
'cops' reversed gives 'spoc'.
'spoc'+'k'='SPOCK'

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(Other definitions for spock that I've seen before include "Star Trek Vulcan" , "aka Leonard Nimoy" , "Star Trek character" , "In terms of childcare, a revolutionary" .)

I've seen this clue in the Evening Standard.

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