Frantic if centre is moved (8)
I believe the answer is:
frenetic
'frantic' is the definition.
(I know that frantic can be written as frenetic)
'if centre is moved' is the wordplay.
'is moved' indicates anagramming the letters.
'if'+'centre'='ifcentre'
'ifcentre' anagrammed gives 'FRENETIC'.
(Other definitions for frenetic that I've seen before include "Extremely agitated -- if recent (anag)" , "Excited, overwrought" , "Re-infect, being quite frenzied" , "Fast and wild" , "Frantic, frenzied" .)