Prime cut from roach — ie fillet (5)

I believe the answer is:

chief

'prime' is the definition.
(thesaurus)

'cut from roach ie fillet' is the wordplay.
'cut from' indicates a hidden word (the answer is cut out of the clue).
'CHIEF' can be found hidden inside 'roach ie fillet'.

(Other definitions for chief that I've seen before include "Gaffer" , "cardinal" , "Principal" , "Ordinary type" , "Leader; most important" .)

I've seen this clue in The Guardian.

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