Pay attention to what's in the editorial? (4)
I believe the answer is:
heed
'pay attention to' is the definition.
(eg to heed a warning is to pay attention to it)
'in the editorial?' is the wordplay.
'in' says the answer is hidden in the clue.
'HEED' is hidden within 'the editorial'.
'what's' is the link.
(Other definitions for heed that I've seen before include "Care, attention (paid)" , "Attend to, mind" , "Obey" , "Take to heart" , "Observe" .)