Learning actor’s part, hands must be reversed (4)
I believe the answer is:
lore
'learning' is the definition.
(both can mean tradition or knowledge)
'actor's part hands must be reversed' is the wordplay.
I cannot quite understand how this works, but
'part' could be 're' (re is a kind of part) and 're' is located in the answer.
The remaining letters 'lo' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for lore that I've seen before include "Tales of old" , "Folk myths" , "Old learning" , "Role for body of traditions" , "old-fashioned thong" .)