If you want something to eat, cry out for a stewed eel! (6)
I believe the answer is:
celery
'if you want something to eat cry' is the definition.
I can't tell whether this defines the answer.
'out for a stewed eel' is the wordplay.
'out' indicates putting letters inside.
'for a' becomes 'cry' (I am not sure about this - if you are sure you should believe this answer much more).
'stewed' is an anagram indicator.
'eel' with letters rearranged gives 'ele'.
'cry' going around 'ele' is 'CELERY'.
Can you help me to learn more?
(Other definitions for celery that I've seen before include "Vegetable with crisp stalks" , "Perhaps sticks on dining table" , "Leafstalks eaten as a vegetable" , "Plant with succulent leaf stalks" , "Plant with edible stems" .)