How a service professional might address crazy mother missing daughter (5)
I believe the answer is:
madam
'how a service professional might address' is the definition.
I can't tell whether this definition defines the answer.
'crazy mother missing daughter' is the wordplay.
'crazy' becomes 'mad' (synonyms).
'mother' becomes 'dam' (female parent of an animal).
'missing' suggests deleting specific letters.
'daughter' becomes 'd' (genealogical abbreviation).
'dam' with 'd' removed is 'am'.
'mad'+'am'='MADAM'
Can you help me to learn more?
(Other definitions for madam that I've seen before include "pompous young lady?" , "What you would call a female customer (or a spoiled girl!)" , "Palindrome used in speaking politely to a woman" , "Term of address to a woman" , "Woman running a brothel" .)