Force has trouble-maker held after dropping case (5)
I believe the answer is:
impel
'force' is the definition.
(I know that force can be written as impel)
'trouble-maker held after dropping case' is the wordplay.
I cannot really understand how this works, but
'case' could be 'imp' and 'imp' is found in the answer.
The remaining letters 'el' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
'has' is the link.
Can you help me to learn more?
(Other definitions for impel that I've seen before include "Constrain" , "'Drive, force (5)'" , "Send or drive forward" , "Urge or force to action" , "Hold together" .)