Skivvy from eg boxers' organisation (8)
I believe the answer is:
dogsbody
'skivvy' is the definition.
(both can mean someone who does boring tasks)
'eg boxers' organisation' is the wordplay.
'eg boxers'' becomes 'dogs' (boxer is a kind of dog).
'organisation' becomes 'body' (body can mean an organisation or group).
'dogs'+'body'='DOGSBODY'
'from' acts as a link.
(Other definitions for dogsbody that I've seen before include "found in pets' cemetery?" , "One given menial tasks" , "Person doing menial jobs" , "Go by odds to find menial worker" , "The one who does all the menial, boring work" .)