Tot your particular sequence of digits up (3)
I believe the answer is:
nip
'tot' is the definition.
(I've seen this in another clue)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for nip that I've seen before include "In the air, it feels cold" , "small draught" , "Shot" , "Catch" , "Small drink of spirits" .)