Working twice - very repetitive! (2,3,2)
I believe the answer is:
on and on
'twice very repetitive' is the definition.
I know nothing about this answer so I cannot judge whether this works.
'working' is the wordplay.
I cannot really see how this works, but
'working' could be 'on' (e.g. a machine is working or on) and 'on' is located in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for on and on that I've seen before include "Endlessly" , "Unceasingly" , "Ever" , "Continuing or continually" , "continuously" .)