Corresponding measure to keep criminal out (2,5)
I believe the answer is:
in touch
'corresponding' is the definition.
'measure to keep criminal out' is the wordplay.
'measure' becomes 'inch' (inch is a kind of measure).
'to keep' indicates putting letters inside.
'criminal' indicates an anagram.
'out' anagrammed gives 'tou'.
'inch' enclosing 'tou' is 'IN TOUCH'.
(Other definitions for in touch that I've seen before include "Out of play; keeping contact" , "over line inside sports stadium?" , "Communicating - out of play" , "Kicked out of play" , "Having up-to-date info" .)