Pioneer with coat pinching hat commonly leading to trouble (5,1,5)
I believe the answer is:
blaze a trail
'pioneer' is the definition.
(I've seen this before)
'coat pinching hat commonly leading to trouble' is the wordplay.
I cannot quite see how this works, but
'trouble' could be 'blaze' (blaze is a kind of trouble) and 'blaze' is present in the answer.
This may be the basis of clue (or it may be nonsense).
'with' acts as a link.
(Other definitions for blaze a trail that I've seen before include "Show the way as a pioneer" , "Explore new areas" , "Be pioneering" , "lead" .)