Unromantic pal screwed up introductory note (8)
I believe the answer is:
platonic
'unromantic' is the definition.
Both the answer and definition are adjectives. Perhaps there's a link between them I don't understand?
'pal screwed up introductory note' is the wordplay.
'screwed up' is an anagram indicator.
'introductory note' becomes 'tonic' (tonic is a kind of note. I am not sure about the 'introductory' bit.**).
'pal' anagrammed gives 'pla'.
'pla'+'tonic'='PLATONIC'
Can you help me to learn more?
(Other definitions for platonic that I've seen before include "Chastely intimate" , "Descriptive of a friendship-only relationship" , "(Of love) without sexual desire" , "sort of solid" , "No-sex" .)