Tired wife prepared cake to be eaten by husband and daughter (7)
I believe the answer is:
whacked
'tired wife' is the definition.
'whacked' can be an answer for 'tired' (whacked can informally mean tired or exhausted). I'm not sure about the 'wife' bit.
'prepared cake to be eaten by husband and daughter' is the wordplay.
'prepared' indicates anagramming the letters.
'to' says to put letters next to each other (I've seen this in other clues).
'be eaten by husband' becomes 'wh' (I can't explain this - if you can you should believe this answer much more).
'and' says to put letters next to each other.
'daughter' becomes 'd' (genealogical abbreviation).
'cake' with letters rearranged gives 'acke'.
'acke' put after 'wh' is 'whacke'.
'whacke'+'d'='WHACKED'
(Other definitions for whacked that I've seen before include "All-in - hit hard" , "Exhausted; hit" .)