Outlaws thus venture to return after having sped off (10)
I believe the answer is:
desperados
'outlaws' is the definition.
'thus venture to return after having sped off' is the wordplay.
'thus' becomes 'so' ('so' can be a synonym of 'thus').
'venture' becomes 'dare' (I've seen this before).
'to return' is a reversal indicator.
'after having' says to put letters next to each other.
'off' indicates anagramming the letters.
'so'+'dare'='sodare'
'sodare' in reverse letter order is 'erados'.
'sped' is an anagram of 'desp'.
'erados' put after 'desp' is 'DESPERADOS'.
(Another definition for desperados that I've seen is " Reckless types".)