Does nothing and some did less! (5)
I believe the answer is:
idles
'does nothing' is the definition.
(I've seen this before)
'some did less' is the wordplay.
'some' indicates the answer is hidden within the clue (some of the parts of the word are used).
'IDLES' is hidden in the letters of 'did less'.
'and' acts as a link.
(Other definitions for idles that I've seen before include "Avoids working" , "Spends time doing nothing" , "Wastes time" , "Of engine, just ticks over in neutral" , "Lazes about, just ticks over" .)