Crossword Genius

A bishop must wear new designer coats (10)

Ross

I believe the answer is:

gaberdines

'coats' is the definition.

'a bishop must wear new designer' is the wordplay.
'bishop' becomes 'b' (abbreviation used in chess).
'must wear' means one lot of letters goes inside another.
'new' is an anagram indicator.
'a'+'b'='ab'
'designer' is an anagram of 'gerdines'.
'ab' put into 'gerdines' is 'GABERDINES'.

I've seen this clue in The Telegraph.
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