Angry nurses battle over trickster's command (3,6)
I believe the answer is:
put across
'command' is the definition.
(I know that command is a more specific form of the action enjoin)
'angry nurses battle over trickster's' is the wordplay.
I cannot really see how this works, but
'angry' could be 'cross' (cross can mean annoyed or angry) and 'cross' is present in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for put across that I've seen before include "Effectively express" , "Effectively communicate" , "communicate comprehensibly" , "Spell out" , "Explain" .)