Annoyed some people, disturbed over her feast being rearranged (7,8)

'rearranged' is the definition.
I don't know anything about this answer so I can't tell whether this works.

'annoyed some people disturbed over her feast' is the wordplay.
'annoyed some people' becomes 'ruffled' (I can't justify this - if you can you should give a lot more credence to this answer).
'disturbed' indicates an anagram (the order of letters is disturbed).
'over' says to put letters next to each other (in a down clue, some letters go over others).
'her' after 'feast' is 'feasther'.
'feasther' is an anagram of 'feathers'.
'ruffled'+'feathers'='RUFFLED FEATHERS'

'being' is the link.

Can you help me to learn more?