Good time girl with northern charm ignoring an orthodox viewpoint (14)

'an orthodox viewpoint' is the definition.
The definition and answer can be both related to thinking as well as being singular nouns.
Maybe there's a link between them I don't understand?

'good time girl with northern charm ignoring' is the wordplay.
I cannot quite understand how this works, but
'time' could be 'am' and 'am' is located in the answer.
'girl' could be 'alis' and 'alis' is found in the answer.
'northern' could be 'n' (abbreviation e.g. N. Ireland) and 'n' is found within the answer.
This explanation may well be incorrect...

Can you help me to learn more?