Order solicitor to go and fight (5-3)
I believe the answer is:
shoot-out
'fight' is the definition.
(I know that shoot-out is a type of fight)
'order solicitor to go' is the wordplay.
'order' becomes 'o' (abbreviation e.g. in British honours OM, OBE etc.).
'solicitor' becomes 'tout' (someone who solicits business).
'to' is a charade indicator (letters next to each other) (I've seen this in other clues).
'go' becomes 'sho' (I can't justify this - if you can you should believe this answer much more).
'o'+'tout'='otout'
'otout' put after 'sho' is 'SHOOT-OUT'.
'and' acts as a link.
(Other definitions for shoot-out that I've seen before include "Gun battle" , "Penalty showdown?" .)