Crossword Genius

Clustering plant associated with Stirling, nominally (4)

Ross

I believe the answer is:

moss

This clue is a double definition.

'clustering plant' is the first definition.

'associated with stirling nominally' is the second definition.
(Stirling Moss was a racing driver)

(Other definitions for moss that I've seen before include "Plant growing on many lawns" , "Type of plant growing in damp places" , "It carpets moist shady places" , "Parasitic plant" , "Plant forming most of my lawn!" .)

I've seen this clue in The Times.
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