As a self-centred person, I get so wound up (6)
I believe the answer is:
egoist
'as a self-centred person' is the definition.
I can't judge whether this defines the answer.
'i get so wound up' is the wordplay.
'wound up' indicates anagramming the letters (letters twisted or wound into a new form).
'i'+'get'+'so'='igetso'
'igetso' anagrammed gives 'EGOIST'.
Can you help me to learn more?
(Other definitions for egoist that I've seen before include "Excessively conceited person" , "Conceited person with little regard for others" , "Conceited and self-centred person" , "self-seeking type" , "It goes around with conceited fellow" .)