Court finally seized stately home's fuel reserves (9)

'fuel reserves' is the definition.
Although both the answer and definition are plural nouns, I can't see how they can define each other.

'court finally seized stately home's' is the wordplay.
'court' becomes 'woo' (both can mean to romance someone).
'finally' says to take the final letters.
'stately home's' becomes 'pile's' (I've seen this in other clues).
The final letter of 'seized' is 'd'.
'woo'+'d'+'piles'='WOODPILES'

Can you help me to learn more?