Washer worked on pegs (6)
I believe the answer is:
sponge
'washer' is the definition.
The answer and definition can be both people as well as being singular nouns.
Perhaps you can see an association between them that I can't see?
'worked on pegs' is the wordplay.
'worked' is an anagram indicator.
'on'+'pegs'='onpegs'
'onpegs' with letters rearranged gives 'SPONGE'.
Can you help me to learn more?
(Other definitions for sponge that I've seen before include "Marine invertebrate" , "Wipe" , "Scrounge; wiper" , "Porous mass for wiping up" , "Cadger" .)