Feeling thrilled about November period (9)
I believe the answer is:
sentiment
'feeling' is the definition.
(a sentiment is a feeling or view)
'thrilled about november period' is the wordplay.
'thrilled' becomes 'sent' (send can mean to thrill or excite).
'about' means one lot of letters goes inside another.
'november' becomes 'N' (phonetic alphabet: alpha, bravo, charlie etc.).
'period' becomes 'time period' (period of time).
'n'+'time'='ntime'
'sent' placed around 'ntime' is 'SENTIMENT'.
(Other definitions for sentiment that I've seen before include "judgement" , "Mawkishness" , "General feeling" , "Tender feeling" , "Emotional thought" .)