Crossword Genius

Show disapproval of king's title (4)

Ross

I believe the answer is:

book

'title' is the definition.
(thesaurus)

'show disapproval of king's' is the wordplay.
'show disapproval of' becomes 'boo'.
'king' becomes 'k' (abbreviation for king in chess).
'boo'+'k'='BOOK'

(Other definitions for book that I've seen before include "Reserve - bets taken on a race" , "thing that shouldn't be cooked?" , "Reserve; tome" , "strict regulations" , "Hardback, say" .)

I've seen this clue in the Sydney Morning Herald.
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