Less wild path for conquering warrior (9)
I believe the answer is:
tamerlane
'conquering warrior' is the definition.
(14th-century conqueror)
'less wild path' is the wordplay.
'less wild' becomes 'tamer' (wild is the opposite of tame).
'path' becomes 'lane' (lane is a kind of path).
'tamer'+'lane'='TAMERLANE'
'for' acts as a link.
(Other definitions for tamerlane that I've seen before include "medieval conqueror" , "Fighter of legend" , "He conquered a huge area" , "Mongol who conquered" .)