Send the wrong way - credits new road first (9)
I believe the answer is:
misdirect
'send the wrong way' is the definition.
(I've seen this in another clue)
'credits new road first' is the wordplay.
'new' indicates an anagram.
'road' becomes 'mi' (resembles M1 motorway).
'first' means one lot of letters go next to another.
'credits' anagrammed gives 'sdirect'.
'sdirect' put after 'mi' is 'MISDIRECT'.
(Other definitions for misdirect that I've seen before include "Give poor travel advice" , "Aim incorrectly" , "Divert" .)