Forced flier to land finally — previously arrested (9)
I believe the answer is:
dragooned
'forced' is the definition.
(dragoon can mean to coerce someone into something)
'flier to land finally previously arrested' is the wordplay.
'flier' becomes 'drone' (flying device).
'to land finally' becomes 'd' (I can't explain this - if you can you should give a lot more credence to this answer).
'previously' becomes 'ago' (I've seen this before).
'arrested' indicates putting letters inside (arrest can mean to hold or imprison).
'drone'+'d'='droned'
'droned' going around 'ago' is 'DRAGOONED'.
(Other definitions for dragooned that I've seen before include "Intimidated" , "Compelled by coercion" , "Bullied" .)