Simply, nothing more than (4)

I believe the answer is:

mere

I believe this clue is a double definition.

'simply' is the first definition.
(I've seen this in another clue)

'nothing more than' is the second definition.
(I've seen this before)

(Other definitions for mere that I've seen before include "See 13" , "Just an English lake" , "Pond, only what is said" , "of no significance" , "Nothing more than a small pond" .)

I've seen this clue in The Irish Times.

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