Essentially the high priest's a cereal cafe regular? (7)
I believe the answer is:
hipster
'a cereal cafe regular?' is the definition.
The definition suggests a singular noun which matches the answer.
'essentially the high priest's' is the wordplay.
'essentially' indicates the central letters.
'high' indicates an anagram (can mean drunk or on drugs and hence disordered).
The middle letter of 'the' is 'h'.
'priest' is an anagram of 'ipster'.
'h'+'ipster'='HIPSTER'
Can you help me to learn more?
(Other definitions for hipster that I've seen before include "Trendsetter" , "jazz he likes" , "Cool dude" , "fitting below the waist" , "Trendy person" .)