Thrill to get knock and slight spin during séance, occasionally (9)
I believe the answer is:
enrapture
'thrill' is the definition.
(I've seen this in another clue)
'knock and slight spin during seance occasionally' is the wordplay.
'knock' becomes 'rap' (synonyms).
'and' says to put letters next to each other.
'slight spin' becomes 'tur' (I am not sure about this - if you are sure you should believe this answer much more).
'during' indicates putting letters inside.
'occasionally' means one should take alternating letters (letters taken at regular intervals or occasions).
The alternate letters of 'seance' are 'ene'.
'rap'+'tur'='raptur'
'raptur' going inside 'ene' is 'ENRAPTURE'.
'to get' is the link.
Can you help me to learn more?
(Other definitions for enrapture that I've seen before include "Bewitch" , "Transport" , "Give delight to" , "entrance" , "Ape Turner (anag.)" .)