Recommend something to cover extremities (4)
I believe the answer is:
ends
'extremities' is the definition.
(end is a kind of extremity)
'recommend something to cover' is the wordplay.
'to cover' indicates the answer is hidden within the clue (I've seen 'covering' mean this).
'ENDS' can be found hidden inside 'recommend something'.
(Other definitions for ends that I've seen before include "passes away" , "Terminates, concludes" , "Destroys" , "Halts" , "Ceases, closes or dies" .)