Canoeing vigorously around river — they say it is bliss (9)
I believe the answer is:
ignorance
'they say it is bliss' is the definition.
The definition suggests an adverb but the answer is not.
'canoeing vigorously around river' is the wordplay.
'vigorously' is an anagram indicator (the letters move vigorously around).
'around' means one lot of letters goes inside another.
'river' becomes 'r' (abbreviation for river).
'canoeing' anagrammed gives 'ignoance'.
'ignoance' going around 'r' is 'IGNORANCE'.
Can you help me to learn more?
(Other definitions for ignorance that I've seen before include "Unintelligence" , "State of unknowing" , "......... of the law is no excuse for breaking it" , "in all innocence" , "Lack of education" .)