Quick ships (5)
I believe the answer is:
fleet
I believe this is a double definition.
'quick' is the first definition.
(I've seen this before)
'ships' is the second definition.
(eg a naval fleet)
(Other definitions for fleet that I've seen before include "Quick of foot" , "Naval force or collection of buses" , "Swift like naval force" , "Squadron" , "Navy - quick" .)