Crossword Genius

Joke with one wearing raincoat like a king? (8)

Ross

I believe the answer is:

majestic

Here is my best explanation:

'like a king?' is the definition.

'joke with one wearing raincoat' is the wordplay.
'joke' becomes 'jest' (synonyms).
'with' is a charade indicator (letters next to each other).
'one' becomes 'i' (Roman numeral).
'wearing' means one lot of letters goes inside another.
'raincoat' becomes 'mac' (mac is a kind of raincoat).
'jest'+'i'='jesti'
'jesti' placed within 'mac' is 'MAJESTIC'.

This clue was last seen in The Times