Follow four letters from the editor (4)
I believe the answer is:
heed
'follow four' is the definition.
'heed' can be an answer for 'follow' (I've seen this in another clue). I am not certain of the 'four' bit.
'letters from the editor' is the wordplay.
'letters from' says the answer is hidden in the clue (a selection of letters from the clue).
'HEED' is hidden within 'the editor'.
Can you help me to learn more?
(Other definitions for heed that I've seen before include "Consider" , "Attend to, mind" , "Listen to carefully" , "Take notice of" , "Careful attention" .)