Worn by soldiers for cleaning drains? (8)
I believe the answer is:
fatigues
I believe this is a double definition.
'worn by soldiers for cleaning' is the first definition.
(I've seen this before)
'drains?' is the second definition.
(I've seen this before)
(Other definitions for fatigues that I've seen before include "Non-military duties of soldiers" , "Military clothing" , "Forces clothing" , "bores" , "Military cover" .)