Request, in snow, is hard (4)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
wish
'request' is the definition.
(I know that wish is a more specific form of order)
'in snow is hard' is the wordplay.
'in' indicates a hidden word.
'WISH' is hidden within 'snow is hard'.
(Other definitions for wish that I've seen before include "whim" , "prayer" , "Express a desire (upon a star?)" , "bid" , "Desire (to pull this bone?)" .)