I'm entertained, tipsily getting hazy (13)
I believe the answer is:
'hazy' is the definition.
'i'm entertained tipsily' is the wordplay.
'tipsily' is an anagram indicator (in a drunk or tipsy way).
'imentertained' anagrammed gives 'INDETERMINATE'.
'getting' is the link.
(Other definitions for indeterminate that I've seen before include "Vague - unsettled" , "not exactly fixed" , "Unfixed, uncertain" , "Not exactly defined" , "Not precisely fixed" .)