I fluffed the shot (6)
I believe the answer is:
tehran
'i' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.
'fluffed the shot' is the wordplay.
'fluffed' is an anagram indicator (I've seen this in other clues).
'shot' becomes 'ran' (I can't justify this - if you can you should give a lot more credence to this answer).
'the' with letters rearranged gives 'teh'.
'teh'+'ran'='TEHRAN'
Can you help me to learn more?
(Other definitions for tehran that I've seen before include "Capital city of Iran (6)" , "Iran's capital" , "Iranian capital" .)