Food has one raising a little complaint (7)
I believe the answer is:
ailment
'complaint' is the definition.
(I know that complaint can be written as ailment)
'food has one raising a little' is the wordplay.
I cannot really see how this works, but
'food' could be 'ail' (ail is a kind of food) and 'ail' is present in the answer.
'one' could be 'me' (a setter might use 'one' to humourously mean 'me') and 'me' is found within the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for ailment that I've seen before include "Physical disorder" , "Tim Alen has an odd indisposition." , "Malady" , "Minor illness" , "problem" .)