Following crafty veteran, essentially (5)
I believe the answer is:
after
'following' is the definition.
(following can mean after or as a result of)
'crafty veteran essentially' is the wordplay.
'crafty' becomes 'af' (I can't justify this - if you can you should believe this answer much more).
'essentially' says to take the centre.
The middle letters of 'veteran' are 'ter'.
'af'+'ter'='AFTER'
Can you help me to learn more?
(Other definitions for after that I've seen before include "Coming later in time" , "Following - behind" , "Chasing" , "In honour of" , "Subsequently" .)