Read sentence till the end and halt abruptly (4,2,1,4,4)
I believe the answer is:
come to a full stop
'read sentence till the end' is the definition.
I know nothing about this answer so I cannot tell whether this works.
'halt abruptly' is the wordplay.
'halt' becomes 'cometoa' (synonyms).
'abruptly' becomes 'fullstop' (I can't justify this - if you can you should believe this answer much more).
'cometoa'+'fullstop'='COME TO A FULL STOP'
'and' acts as a link.
Can you help me to learn more?
(Other definitions for come to a full stop that I've seen before include "end" , "A period required after" .)