Block son taking my turn in match (6)
I believe the answer is:
stymie
'block' is the definition.
('stymie' can be a synonym of 'block')
'son taking my turn in match' is the wordplay.
'son' becomes 's'.
'taking' means one lot of letters go next to another.
'turn' is an anagram indicator.
'in' indicates putting letters inside.
'match' becomes 'tie' (I've seen this before**).
'my' with letters rearranged gives 'ym'.
'ym' inserted within 'tie' is 'tymie'.
's'+'tymie'='STYMIE'
(Other definitions for stymie that I've seen before include "Hinder, obstruct, thwart" , "Thwart (as once was possible on the green)" , "Situation from which it is almost impossible to proceed" , "Old putting problem" , "Block or obstruct as in golf (6)" .)