Apprehension about article on a snake as ornamentation (7,3)
I believe the answer is:
feather boa
'ornamentation' is the definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.
'apprehension about article on a snake' is the wordplay.
'apprehension' becomes 'fear' (I've seen this in another clue).
'about' is an insertion indicator.
'article on' becomes 'the' (the definite article in English. I am not sure about the 'on' bit.).
'a snake' becomes 'boa' (boa is a kind of snake).
'fear' enclosing 'the' is 'feather'.
'feather'+'boa'='FEATHER BOA'
'as' is the link.
Can you help me to learn more?
(Another definition for feather boa that I've seen is " Fancy scarf".)