Having to do embroidery is a pain! (6)
I believe the answer is:
stitch
'pain' is the definition.
(pain in the body)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for stitch that I've seen before include "Pain caused by running" , "One in time saves nine" , "closer" , "Sew - sharp pain in side" , "A result of running" .)