So, no end to working alone (2,4,3)
I believe the answer is:
on ones tod
Here is my best explanation:
'alone' is the definition.
(I've seen this before)
'so no end to working' is the subsidiary indication.
'working' indicates anagramming the letters.
'sonoendto' anagrammed gives 'ononestod'.
(Other definitions for on ones tod that I've seen before include "Alone", "solo" and "reverse of 9 [AIDED] ?".)