Returns to the bar casually yet eagerly! (7)

'yet eagerly' is the definition.
I can't judge whether this definition defines the answer.

'returns to the bar casually' is the wordplay.
'returns' becomes 'idly' (I can't justify this - if you can you should give a lot more credence to this answer).
'to' means one lot of letters go next to another (I've seen this in other clues).
'casually' is an anagram indicator (I've seen this in other clues).
'bar' is an anagram of 'rab'.
'idly' after 'rab' is 'RABIDLY'.

Can you help me to learn more?