Co-ordinates of signal readjusted (6)
I believe the answer is:
aligns
'co-ordinates' is the definition.
('align' can be a synonym of 'coordinate')
'signal readjusted' is the wordplay.
'readjusted' indicates anagramming the letters.
'signal' anagrammed gives 'ALIGNS'.
'of' acts as a link.
(Other definitions for aligns that I've seen before include "Arranges, in rows say" , "Fits (with)" , "Arranges in signal" , "Lines up" , "Arranges in a straight row" .)