Pointers like a fox – for no good reason (10)
I believe the answer is:
needlessly
'for no good reason' is the definition.
(I've seen this before)
'pointers like a fox' is the wordplay.
'pointers' becomes 'needles' (needle is a kind of pointer).
'like a fox' becomes 'sly' (I've seen this in another clue).
'needles'+'sly'='NEEDLESSLY'
(Other definitions for needlessly that I've seen before include "without any necessity" , "Unnecessarily" , "without good reason" , "without justification" .)