Force subject to go ahead of time (3,3)
I believe the answer is:
the met
'force' is the definition.
'subject to go ahead of time' is the wordplay.
I cannot quite see how this works, but
'subject' could be 'theme' (theme can mean a topic or subject) and 'theme' is present in the answer.
'time' could be 't' (abbreviation) and 't' is located in the answer.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Another definition for the met that I've seen is " London's police".)