Writers who use clever cribs two ways (7)
I believe the answer is:
scribes
'writers who use' is the definition.
'scribes' can be an answer for 'writers' (scribe is a kind of writer). I am not sure about the remainder of the definition.
'clever cribs two ways' is the wordplay.
'two ways' can mean two replacements for 'way'.
'clever' indicates an anagram.
'way' becomes 'e' (Compass direction - East).
'way' becomes 's' (Compass direction - South).
'cribs'+'e'='cribse'
'cribse' is an anagram of 'scribe'.
'scribe'+'s'='SCRIBES'
Can you help me to learn more?
(Other definitions for scribes that I've seen before include "Ancient writers (7)" , "journos" , "Copyists" , "People who once made hand-written copies" .)