Even I'd thrown out a bit of salad! (6)
I believe the answer is:
endive
'a bit of salad' is the definition.
'endive' can be an answer for 'salad' (I've seen this before). I am unsure of the 'a bit of' bit.
'even i'd thrown out' is the wordplay.
'thrown out' is an anagram indicator.
'even'+'id'='evenid'
'evenid' anagrammed gives 'ENDIVE'.
Can you help me to learn more?
(Other definitions for endive that I've seen before include "Salad plant related to chicory" , "Envied (anag.)" , "Portion of salad" , "Type of chicory" , "Plant used in salads" .)