Turned mind to breaking embargo in sport (9)
I believe the answer is:
badminton
'sport' is the definition.
(I know that Badminton is a type of court game)
'turned mind to breaking embargo' is the wordplay.
'turned' indicates anagramming the letters.
'breaking' indicates putting letters inside.
'embargo' becomes 'ban' (I've seen this in another clue).
'mind'+'to'='mindto'
'mindto' with letters rearranged gives 'dminto'.
'dminto' inserted inside 'ban' is 'BADMINTON'.
'in' acts as a link.
(Other definitions for badminton that I've seen before include "in which rackets are involved" , "court action" , "One sport" , "22 Across sport" , "A sport; Beaufort seat" .)