Scottish landmark with a bit missing (6)

I believe the answer is:

lanark

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

'bit missing' is the definition.
I can't judge whether this defines the answer.

'scottish landmark with a' is the wordplay.
'scottish landmark' becomes 'lark' (I can't explain this - if you can you should believe this answer much more).
'with' indicates putting letters inside.
'a' becomes 'an'.
'lark' going around 'an' is 'LANARK'.

Can you help me to learn more?

(Other definitions for lanark that I've seen before include "town in Scotland" , "Scots town" , "Scottish town" .)

I've seen this clue in the Evening Standard.

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.