The most common and most likely answer to this crossword clue is the 10 letter word MAJOR-DOMO
I've seen this crossword clue in The Times
M
A
J
O
R
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D
O
M
O
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The straight part
We know that "Household official" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case household official = major-domo.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does MAJOR-DOMO mean?
MAJOR-DOMO noun- The head servant or official in a royal Spanish or Italian household; later, any head servant in a wealthy household in a foreign country; a leading servant or butler.
- (Southwest) A manager of a hacienda, ranch or estate.
- Any overseer, organizer, person in command.