In order, I decide to mock! (6)
I believe the answer is:
deride
'mock' is the definition.
(deriding is a kind of mocking)
'in order i decide' is the wordplay.
'in' indicates a hidden word.
'DERIDE' is hidden within 'order i decide'.
'to' is the link.
(Other definitions for deride that I've seen before include "Knock" , "Test performance" , "Disparage" , "Jeer, make little of" , "Poke fun at" .)