Extra hug really short (4)
I believe the answer is:
over
'extra' is the definition.
(both can mean left over)
'hug really short' is the wordplay.
'hug' becomes 'o' (O can represent a hug in written messages).
'really' becomes 'very' (I've seen this in another clue).
'short' means to remove the last letter.
'very' with its last letter removed is 'ver'.
'o'+'ver'='OVER'
(Other definitions for over that I've seen before include "Round of six bowls in cricket - then it's finished" , "left for another day?" , "See 18" , "Six balls in cricket" , "Finished; six balls" .)