Do things in an entirely different way (5,3,5)

I believe the answer is:

break the mould

(Other definitions for break the mould that I've seen before include "at the risk of upsetting jelly-maker?" , "Try something new" , "Change things completely (as the SDP tried to)" , "Change the accepted style or way of doing of things" , "Do something radically differently" .)

I've seen this clue in The Guardian.

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