Salad plant that's strangely veined (6)
I believe the answer is:
endive
'salad plant' is the definition.
(I've seen this before)
'strangely veined' is the wordplay.
'strangely' is an anagram indicator.
'veined' anagrammed gives 'ENDIVE'.
'that's' is the link.
(Other definitions for endive that I've seen before include "Veined (anag) - salad plant" , "Envied the salad green badly" , "Plant used in salads" , "Edible plant" , "Curly-leaved plant used as salad" .)