Anita oddly cuddles rotter in Canadian region (6)
I believe the answer is:
acadia
'canadian region' is the definition.
'Acadia' can be an answer for 'region' (Acadia is an example). I'm unsure of the 'canadian' bit.
'anita oddly cuddles rotter' is the wordplay.
'oddly' indicates alternate letters (letters in odd-numbered positions).
'cuddles' is an insertion indicator.
'rotter' becomes 'cad' (a cad is a dishonourable person).
The alternating letters of 'anita' are 'aia'.
'aia' going around 'cad' is 'ACADIA'.
'in' acts as a link.
Can you help me to learn more?
(Other definitions for acadia that I've seen before include "old part of Canada" , "French colony, now Nova Scotia" , "Region in North America that includes Canada" .)