Dauntless porter (5)
I believe the answer is:
stout
I believe this clue is a double definition.
'dauntless' is the first definition.
(I've seen this in another clue)
'porter' is the second definition.
(porter can mean stout)
(Other definitions for stout that I've seen before include "Rather fat, stocky" , "Round" , "Bulky" , "Resolute" , "pint" .)