Literary tale-teller working through holiday period (8)
I believe the answer is:
summoner
'literary tale-teller' is the definition.
I can't judge whether this defines the answer.
'working through holiday period' is the wordplay.
'working' becomes 'on' (on can mean working or activated).
'through' is an insertion indicator (inserted letters go through the word).
'holiday period' becomes 'summer' (I can't justify this - if you can you should give a lot more credence to this answer).
'on' inserted inside 'summer' is 'SUMMONER'.
Can you help me to learn more?
(Other definitions for summoner that I've seen before include "Chaucerian court official" , "[PILGRIM in the CANTERBURY TALES]" .)