Call round a little afterwards, being sly (6)
I believe the answer is:
crafty
'sly' is the definition.
(I know that sly can be written as crafty)
'call round a little afterwards' is the wordplay.
'call' becomes 'cry' (as in a bird's call).
'round' means one lot of letters goes inside another.
'a little afterwards' becomes 'aft' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'cry' placed around 'aft' is 'CRAFTY'.
'being' is the link.
Can you help me to learn more?
(Other definitions for crafty that I've seen before include "Cunning and artful" , "Devious" , "Cunning and ingenious" , "Sly" , "Cunning - shrewd" .)