Gradually have quiet lunch, say (9)
I believe the answer is:
piecemeal
'gradually' is the definition.
(I've seen this before)
'quiet lunch say' is the wordplay.
'quiet' becomes 'piece' (I can't explain this - if you can you should give a lot more credence to this answer).
'lunch say' becomes 'meal' (lunch is a kind of meal).
'piece'+'meal'='PIECEMEAL'
'have' is the link.
Can you help me to learn more?
(Other definitions for piecemeal that I've seen before include "A bit at a time" , "by degrees" , "a little at a time" , "Unsystematically" , "step by step" .)