Twofold; bent over (6)
I believe the answer is:
double
I believe this is a double definition.
'twofold' is the first definition.
(I know that twofold can be written as double)
'bent over' is the second definition.
(as in being doubled over)
(Other definitions for double that I've seen before include "Twice, the size say" , "Ringer - large drink" , "Twice - bent over - run" , "Score of forty with one dart, perhaps?" , "Twin, dual" .)