Though most sensible, is in an awful stew (6)
I believe the answer is:
wisest
'though most sensible' is the definition.
I can't tell whether this definition defines the answer.
'is in an awful stew' is the wordplay.
'in' is an insertion indicator.
'an awful' is an anagram indicator.
'stew' is an anagram of 'west'.
'is' put within 'west' is 'WISEST'.
Can you help me to learn more?
(Other definitions for wisest that I've seen before include "Showing most knowledge and best judgment" , "Superlatively sage" , "Most sage or experienced" , "Most astute" , "Most sensible" .)