Preserve sheep climbing over boy in West (9)

I believe the answer is:

marmalade

I'm a little stuck... Click here to teach me more about this clue!

'preserve' is the definition.
(I know that marmalade is a type of preserve)

'sheep climbing over boy in west' is the wordplay.
'sheep' becomes 'ram' (male sheep).
'climbing' shows that the letters should be reversed in order (in a down clue, letters climb up).
'over boy' becomes 'lad' (informal term for boy. I am not sure about the 'over' bit.).
'in' means one lot of letters goes inside another.
'west' becomes 'Mae' (actress Mae West).
'ram' reversed gives 'mar'.
'lad' placed inside 'mae' is 'malade'.
'mar'+'malade'='MARMALADE'

Can you help me to learn more?

(Other definitions for marmalade that I've seen before include "Orange preserve" , "Spread" , "Breakfast preserve" , "Eleven's [PRESERVE]" , "confiture" .)

I've seen this clue in The Sun.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.