Crossword Genius

Wild flower trail expanded (3,4)

Ross

I believe the answer is:

dog rose

'wild flower' is the definition.
(I know that dog rose is a type of wild flower)

'trail expanded' is the wordplay.
'trail' becomes 'dog' (synonyms).
'expanded' becomes 'rose' (rise can mean to expand or grow).
'dog'+'rose'='DOG-ROSE'

(Other definitions for dog rose that I've seen before include "Flower of the hedgerow" , "wild shrub" , "something smelling nice in the hedgerow" , "bloomer" , "Hedgerow plant" .)

I've seen this clue in The Guardian.
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