Tip I have for some salad (6)
I believe the answer is:
endive
'some salad' is the definition.
(I've seen this before)
'tip i have' is the wordplay.
'tip' becomes 'end' (tip can mean the end of something).
'i have' becomes 'I've' (contraction of 'I have').
'end'+'ive'='ENDIVE'
'for' is the link.
(Other definitions for endive that I've seen before include "Salad plant with crisp curly leaves" , "Veined (anag) - salad plant" , "Plant used in salads" , "Type of chicory" , "Envied (anag.)" .)