Stop after advance by titled lady — there you are (2,3,6)
I believe the answer is:
lo and behold
'there you are' is the definition.
I know nothing about this answer so I cannot tell whether this works.
'stop after advance by titled lady' is the wordplay.
I cannot really understand how this works, but
'stop' could be 'ho' (I've seen this in other clues) and 'ho' is found within the answer.
'advance' could be 'loan' (an advance is a loan) and 'loan' is present in the answer.
'lady' could be 'bel' and 'bel' is present in the remaining letters.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for lo and behold that I've seen before include "what a wonderful thing" , "This is new!" .)