Confuse and upset little Deborah with boundless mazes (6)

'confuse' is the definition.
Although both the answer and definition are verbs in their base form, I can't see how one could define the other.

'upset little deborah with boundless mazes' is the wordplay.
'upset little deborah' becomes 'bed' (I can't explain this - if you can you should give a lot more credence to this answer).
'with' is a charade indicator (letters next to each other).
'boundless' means to look at the middle letters (the limits or bounds of the word are removed).
The middle letters of 'mazes' are 'aze'.
'bed'+'aze'='BEDAZE'

'and' is the link.

Can you help me to learn more?