Move fast, finally producing financial statement (6)
I believe the answer is:
budget
'financial statement' is the definition.
(I've seen this before)
'move fast finally' is the wordplay.
'move' becomes 'budge' (to budge is to move slightly).
'finally' indicates one should take the final letters.
The final letter of 'fast' is 't'.
'budge'+'t'='BUDGET'
'producing' acts as a link.
(Other definitions for budget that I've seen before include "Chancellor of the Exchequer's responsibility?" , "Government plan" , "Chancellor's plan" , "Chancellor's proposals" , "Plan financially" .)