High spirits shown in use of slang out East (6)
I believe the answer is:
angels
'high spirits' is the definition.
'angels' can be an answer for 'spirits' (I've seen this before). I am not sure about the 'high' bit.
'use of slang out east' is the wordplay.
'use of' indicates anagramming the letters.
'out' means one lot of letters goes inside another.
'east' becomes 'E' (synonyms).
'slang' is an anagram of 'angls'.
'angls' enclosing 'e' is 'ANGELS'.
'shown in' is the link.
Can you help me to learn more?
(Other definitions for angels that I've seen before include "Supernatural messengers" , "Thrones maybe" , "Heavenely guardians" , "Gleans that they're heavenly" , "Ministering spirits" .)