Dispatch note to Cons (5)
I believe the answer is:
haste
'dispatch' is the definition.
(I've seen this in another clue)
'note to cons' is the wordplay.
'note' becomes 'te' (musical note as in do re mi fa so la ti).
'to' says to put letters next to each other (I've seen this in other clues).
'cons' becomes 'has' (I've seen this in another clue).
'te' after 'has' is 'HASTE'.
(Other definitions for haste that I've seen before include "Hurriedness" , "Rash speed" , "Rapidity" , "Inconsiderate speed" , "The more of it, the less speed sometimes" .)