Ate well as one sat sprawlingly during a meal (7)
I believe the answer is:
feasted
'ate well as one sat' is the definition.
'feasted' can be an answer for 'ate' (feasting is a kind of eating). I am not sure about the 'well as one sat' bit.
'sprawlingly during a meal' is the wordplay.
'sprawlingly' becomes 'ast' (I can't justify this - if you can you should believe this answer much more).
'during' indicates putting letters inside.
'a meal' becomes 'feed' (feed can mean food).
'ast' put into 'feed' is 'FEASTED'.
Can you help me to learn more?
(Other definitions for feasted that I've seen before include "Banqueted" , "Ate high off the hog" , "Had a lot to eat" , "Ate lavishly" .)