Spin doctor great around start of year (6)
I believe the answer is:
gyrate
'spin' is the definition.
('gyrate' can be a synonym of 'spin')
'doctor great around start of year' is the wordplay.
'doctor' indicates an anagram.
'around' is an insertion indicator.
'start of year' becomes 'y'.
'great' with letters rearranged gives 'grate'.
'grate' going around 'y' is 'GYRATE'.
(Other definitions for gyrate that I've seen before include "Go round" , "Move in a circle or spiral" , "wheel" , "Spin at speed" , "Spiral about a point" .)