Is she too old to miss? (5)
I believe the answer is:
madam
'to miss?' is the definition.
(thesaurus)
'is she too old' is the wordplay.
I cannot really see how this works, but
'she' could be 'ada' and 'ada' is present in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for madam that I've seen before include "Term of address to a woman" , "Bossy girl" , "Woman with status - girl with bad manners" , "Woman of standing" , "Woman running a brothel" .)