Moon having ghostly appearance gets one in a state (5)
I believe the answer is:
iowan
'appearance gets one in a state' is the definition.
I can't judge whether this definition defines the answer.
'moon having ghostly' is the wordplay.
'moon' becomes 'Io' (moon of Jupiter).
'having' says to put letters next to each other.
'ghostly' becomes 'wan' (I've seen this in another clue).
'io'+'wan'='IOWAN'
Can you help me to learn more?
(Other definitions for iowan that I've seen before include "Midwesterner" , "From Des Moines, say?" , "From a US state, capital Des Moines" , "One from Des Moines perhaps" , "American" .)