Look disdainfully both ways, always? (5)
I believe the answer is:
sneer
'look' is the definition.
(I have seen 'Contemptuous look ' mean 'sneer' so perhaps 'look' could also mean 'sneer')
'disdainfully both ways always?' is the wordplay.
'disdainfully both ways' becomes 'sn' (I am not sure about this - if you are sure you should believe this answer much more).
'always?' becomes 'eer' (poetic way of saying ever).
'sn'+'eer'='SNEER'
Can you help me to learn more?
(Other definitions for sneer that I've seen before include "Be derisive; Sheridan's Critic" , "Show cynical contempt" , "Derisive remark" , "Contemptuous remark" , "Contemptuous or mocking smile" .)