Being clever, you'll get this in one attempt (4)
I believe the answer is:
neat
'being clever' is the definition.
(I've seen this in another clue)
'this in one attempt' is the wordplay.
'this in' indicates the answer is hidden within the clue.
'NEAT' is hidden within 'one attempt'.
'you'll get' is the link.
(Other definitions for neat that I've seen before include "cows earlier" , "Tidy and uncluttered" , "Cool - without a mixer" , "Bovine animal" , "Straight - cool!" .)