Otherwise can exit ballpark (7)
I believe the answer is:
inexact
'ballpark' is the definition.
(I've seen this in another clue)
'otherwise can exit' is the wordplay.
'otherwise' is an anagram indicator.
'can'+'exit'='canexit'
'canexit' anagrammed gives 'INEXACT'.
(Other definitions for inexact that I've seen before include "Fuzzy, muddled" , "Not precise, ambiguous" , "not wholly Right" , "Vague" , "estimated?" .)