Labour's conclusion — government must call an election now (3,2,4)
I believe the answer is:
end of term
'an election now' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.
'labour's conclusion government must call' is the wordplay.
I cannot really see how this works, but
'conclusion' could be 'end' (something's conclusion is its end) and 'end' is present in the answer.
'call' could be 'term' (to term something is to call it something) and 'term' is present in the answer.
The remaining letters 'of' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for end of term that I've seen before include "Time to break up" , "when policy matures" .)