Cleric mounted so-called ‘lake painter’ (7)

I believe the answer is:

vermeer

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'painter' is the definition.
(Johannes Vermeer, 1632-1675)

'cleric mounted so-called lake' is the wordplay.
'cleric' becomes 'Rev' (abbreviation for Reverend).
'mounted' says the letters should be written in reverse (in a down clue, letters mounted up).
'so-called lake' becomes 'meer' (I can't justify this - if you can you should believe this answer much more).
'rev' reversed gives 'ver'.
'ver'+'meer'='VERMEER'

Can you help me to learn more?

(Other definitions for vermeer that I've seen before include "He painted The Girl with the Pear Earring" , "Dutch old master noted for his use of light" , "Girl with a Pearl Earring artist" , "Painter of Girl with a Pearl Earring, d. 1675" , "'Dutch painter, noted for his use of light (7)'" .)

I've seen this clue in the Sydney Morning Herald.

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