Seated in order to seem dignified (6)
I believe the answer is:
sedate
'dignified' is the definition.
(I've seen this in another clue)
'seated in order' is the wordplay.
'in order' is an anagram indicator (the letters in a new order).
'seated' with letters rearranged gives 'SEDATE'.
'to seem' is the link.
This may not be right. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for sedate that I've seen before include "Placid" , "Administer a calming drug" , "Dignified - staid" , "Staid; put to sleep" , "Composed and staid" .)