Move round back rank (9)
I believe the answer is:
rearrange
'move round' is the definition.
(I've seen this before)
'back rank' is the wordplay.
'back' becomes 'rear' (something's rear is its back).
'rank' becomes 'range' (synonyms).
'rear'+'range'='REARRANGE'
(Other definitions for rearrange that I've seen before include "Adjust" , "Rear anger (anag.)" , "Put in new order" , "Put new structure" , "Change the position of" .)