Seated, being agitated or calm? (6)
I believe the answer is:
sedate
'calm?' is the definition.
(I know that calm can be written as sedate)
'seated being agitated' is the wordplay.
'being agitated' indicates an anagram.
'seated' is an anagram of 'SEDATE'.
'or' is the link.
(Other definitions for sedate that I've seen before include "Prim and proper" , "Leisurely" , "Staid - tranquillise" , "Quiet and rather dull" , "Calm - staid" .)