Take any measure, yet come to a halt for no reason (4,2,7)
I believe the answer is:
stop at nothing
'take any measure yet come' is the definition.
I can't tell whether this definition defines the answer.
'a halt for no reason' is the wordplay.
I cannot quite understand how this works, but
'a' is found in the answer.
'halt' could be 'stop' (synonyms) and 'stop' is located in the answer.
'no' could be 'nothing' (synonyms) and 'nothing' is located in the answer.
A single letter 't' remains which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
'to' acts as a link.
Can you help me to learn more?
(Other definitions for stop at nothing that I've seen before include "Be totally ruthless" , "3 [COUNTDOWN CONUMDRUM] will" , "Ignore all scruples" , "as announcers of rocket launches do?" , "Act ruthlessly" .)