Get upset about European record that's unnerving (6)
I believe the answer is:
creepy
'that's unnerving' is the definition.
I can't tell whether this definition defines the answer.
'get upset about european record' is the wordplay.
'get upset' becomes 'cry'.
'about' indicates putting letters inside.
'european' becomes 'E' (abbreviation e.g. EU).
'record' becomes 'EP' (abbreviation for extended play record).
'e'+'ep'='eep'
'cry' going around 'eep' is 'CREEPY'.
Can you help me to learn more?
(Other definitions for creepy that I've seen before include "Disturbing and sinister" , "repulsive" , "horror" , "Annoying and unpleasant" , "Spooky" .)