Outlaw speared criminal, con (9)
I believe the answer is:
desperado
'outlaw' is the definition.
(I know that Desperado is a type of outlaw)
'speared criminal con' is the wordplay.
'criminal' indicates an anagram.
'con' becomes 'do' (to 'do' someone could be to con them).
'speared' anagrammed gives 'despera'.
'despera'+'do'='DESPERADO'
(Other definitions for desperado that I've seen before include "Wild ruffian" , "Bold outlaw on the American frontier" , "Road speed (anag.)" , "Gangster" , "Bandit, outlaw" .)