Decreases caddie's burden (5)
I believe the answer is:
irons
This might be a double definition.
'decreases' is the first definition.
(de-creases: removes creases by ironing clothes)
'caddie's burden' is the second definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
Can you help me to learn more?
(Other definitions for irons that I've seen before include "in which one is restrained" , "English actor" , "Smooths, presses" , "things for an evening out" , "Devices restricting personal freedom in prisons" .)