I'm upset to be limited by eye problem in snooker (6)
I believe the answer is:
stymie
'snooker' is the definition.
(thesaurus)
'i'm upset to be limited by eye problem' is the wordplay.
'upset' is an anagram indicator.
'to be limited by' indicates putting letters inside (limit can mean to contain or border off).
'eye problem' becomes 'stye' (I've seen this before).
'im' with letters rearranged gives 'mi'.
'mi' put into 'stye' is 'STYMIE'.
'in' is the link.
(Other definitions for stymie that I've seen before include "'Hinder, obstruct (6)'" , "Frustrate" , "'Hinder, prevent progress (6)'" , "Block; hinder" , "Block or thwart, perhaps on putting green" .)