Footwear next to yard not to be trusted (8)
I believe the answer is:
slippery
'not to be trusted' is the definition.
(I've seen this before)
'footwear next to yard' is the wordplay.
I cannot quite see how this works, but
'footwear' could be 'slipper' (slipper is a kind of footwear) and 'slipper' is present in the answer.
'yard' could be 'y' (abbreviation) and 'y' is found within the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for slippery that I've seen before include "Wet, slimy; evasive" , "Hard to grasp or walk on" , "Hard to grasp, like an eel" , "Evasive like an eel" , "Descent into sin in this sort of slope" .)