For a change, dad’s at a museum: whose? (6,7)
I believe the answer is:
madame tussaud
'whose?' is the definition.
I know nothing about this answer so I can't tell whether it can be defined by this definition.
'for a change dad's at a museum' is the wordplay.
'for a change' indicates an anagram.
'dads'+'at'+'a'+'museum'='dadsatamuseum'
'dadsatamuseum' with letters rearranged gives 'MADAME TUSSAUD'.
Can you help me to learn more?
(Other definitions for madame tussaud that I've seen before include "her sculpture attempted realism" , "Swiss woman who modelled in London" .)