Where a full stop is terminal (3,2,3,4)
I believe the answer is:
end of the line
'is terminal' is the definition.
(I've seen this before)
'where a full stop' is the wordplay.
I cannot really understand how this works, but
'stop' could be 'end' (synonyms) and 'end' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for end of the line that I've seen before include "The final point" , "There's nothing more to be done" , "Point beyond which one cannot continue" , "Point beyond which it is useless or impossible to proceed" , "Point one cannot go beyond" .)