Editor's pitched into recurring case of Lane's attraction of Kent (5,6)
I believe the answer is:
leeds castle
'attraction of kent' is the definition.
I know nothing about this answer so I cannot judge whether this works.
'editor's pitched into recurring case of lane's' is the wordplay.
'editor's' becomes 'ed's' (abbreviation).
'pitched' becomes 'cast' (I've seen this in another clue).
'into' indicates putting letters inside.
'recurring' says to double the letters (the letters occur more than once).
'case of' means to remove the middle letters (outsides of).
'lane' with its centre removed is 'le'.
'eds'+'cast'='edscast'
'le' doubled is 'lele'.
'edscast' inserted inside 'lele' is 'LEEDS CASTLE'.
Can you help me to learn more?
(Other definitions for leeds castle that I've seen before include "Kent tourist attraction" , "British medieval palace" , "Keep" , "Historic building near Maidstone" , "wrongly suggesting it's in Yorkshire?" .)