Let sleeping dogs lie in desert, completely isolated (5,4,5)

I believe the answer is:

leave well alone

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'let sleeping dogs lie' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.

'desert completely isolated' is the wordplay.
'desert' becomes 'leave' (desert can mean to leave or abandon).
'completely' becomes 'well'.
'isolated' becomes 'alone' (similar in meaning).
'leave'+'well'+'alone'='LEAVE WELL ALONE'

'in' acts as a link.

Can you help me to learn more?

(Other definitions for leave well alone that I've seen before include "Don't get involved" , "Don't interfere" , "make no waves" , "Draw no water" , "Don't change" .)

I've seen this clue in The Telegraph.

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