Spread secrets - raw plant (10)
I believe the answer is:
watercress
'plant' is the definition.
(watercress is a kind of plant)
'spread secrets raw' is the wordplay.
'spread' indicates an anagram.
'secrets'+'raw'='secretsraw'
'secretsraw' is an anagram of 'WATERCRESS'.
(Other definitions for watercress that I've seen before include "bit of salad" , "Edible aquatic plant" , "low-calorie food" , "Salad plant" , "Salad vegetable" .)