What does the cryptic crossword clue "Upset some toddler on a mucky seat (5)" mean?

The definition is "seat". The wordplay uses hidden reversed. Hidden (‘some’) and reversed (‘upset’) in toddleR ON A Mucky The answer is MANOR.

Upset some toddler on a mucky seat (5)

Independent Cryptic #11640 | 3 Down | 2024-01-31 flower