A pile of snow moving aimlessly (6)
I believe the answer is:
adrift
'aimlessly' is the definition.
(I've seen this in another clue)
'a pile of snow moving' is the wordplay.
I cannot really see how this works, but
'a' is present in the answer.
The remaining letters 'drift' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for adrift that I've seen before include "(Of boat) moving out of control" , "Floating uncontrolled" , "without purpose or direction" , "cut loose" , "Unsettled or unanchored" .)