A mere pigment (4)

I believe the answer is:

lake

I believe this clue is a double definition.

'a mere' is the first definition.
(I've seen this before)

'pigment' is the second definition.
(I know that lake is a type of pigment)

(Other definitions for lake that I've seen before include "Large area of water; pigment" , "Excess of wine?" , "Mere - organic pigment" , "Large pond; pigment" , "Superior's one" .)

I've seen this clue in The Irish Independent.

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