Agitatedly paces the room (5)
I believe the answer is:
space
'room' is the definition.
(I've seen this before)
'agitatedly paces' is the wordplay.
'agitatedly' indicates an anagram (I've seen this in other clues).
'paces' anagrammed gives 'SPACE'.
'the' acts as a link.
(Other definitions for space that I've seen before include "Free area" , "Gap between words" , "Empty area, may be outer" , "Cosmos" , "Room for capes" .)