They may claim flavourless scraps (10)
I believe the answer is:
plaintiffs
'they may claim' is the definition.
The definition suggests an adverb but the answer is not.
'flavourless scraps' is the wordplay.
'flavourless' becomes 'plain' (I can't justify this - if you can you should give a lot more credence to this answer).
'scraps' becomes 'tiffs' (I've seen this in another clue).
'plain'+'tiffs'='PLAINTIFFS'
Can you help me to learn more?
(Other definitions for plaintiffs that I've seen before include "They're seen in court contesting" , "Litigants" , "Those bringing cases" , "They make suits" .)