Took big steps to get out of Dorset (6)
I believe the answer is:
strode
'took big steps' is the definition.
(I've seen this in another clue)
'out of dorset' is the wordplay.
'out of' is an anagram indicator.
'dorset' is an anagram of 'STRODE'.
'to get' acts as a link.
(Other definitions for strode that I've seen before include "went on foot" , "Walked fast with long steps" , "Paced" , "Galumphed" .)