Ali appears in crazy gear fit for a king (7)
I believe the answer is:
regalia
'ali appears in crazy gear fit for a king' is the definition.
I can't tell whether this defines the answer.
'ali appears in crazy gear' is the wordplay.
'appears in' indicates putting letters inside.
'crazy' indicates anagramming the letters.
'gear' is an anagram of 'rega'.
'ali' put within 'rega' is 'REGALIA'.
Can you help me to learn more?
(Other definitions for regalia that I've seen before include "Orb and sceptre etc" , "Royal insignia" , "Royal accoutrements" , "Array" , "Royal items" .)