Spot symbol (4)

I believe the answer is:

mark

I believe this is a double definition.

'spot' is the first definition.
(I know that spot is a more specific form of mark)

'symbol' is the second definition.
(I know that mark is a type of symbol)

(Other definitions for mark that I've seen before include "Characteristic" , "Former German monetary unit" , "previous European finance" , "symbol" , "What one might have paid old German" .)

I've seen this clue in The Irish Times.

Want a hint initially instead of a full solution? Install my app