Sporty sort in form takes extraordinary run (6,6)
I believe the answer is:
figure skater
'sporty sort' is the definition.
(type of sportsperson)
'form takes extraordinary run' is the wordplay.
'form' becomes 'figure' (figure is a kind of form).
'extraordinary' is an anagram indicator.
'run' becomes 'r' (cricket abbreviation).
'takes' is an anagram of 'skate'.
'figure'+'skate'+'r'='FIGURE SKATER'
'in' is the link.
(Other definitions for figure skater that I've seen before include "Pattern maker on ice" , "Sporting type" .)