Block a putt that changed my ties (6)
I believe the answer is:
stymie
'block a putt' is the definition.
'stymie' can be an answer for 'block' (synonyms). I am unsure of the 'a putt' bit.
'changed my ties' is the wordplay.
'changed' is an anagram indicator.
'my'+'ties'='myties'
'myties' with letters rearranged gives 'STYMIE'.
'that' acts as a link.
Can you help me to learn more?
(Other definitions for stymie that I've seen before include "Block or thwart, say a golf putt" , "balk" , "Old putting problem" , "Thwart - block - my site (anag)" , "Block the path of, as on golf green" .)