Pal upset by a boy being given a thin coat (6)
I believe the answer is:
plated
'given a thin coat' is the definition.
The definition and answer can be both related to thinking as well as being past participle verbs.
Maybe there's an association between them I don't understand?
'pal upset by a boy' is the wordplay.
'upset by' indicates an anagram.
'a boy' becomes 'ted' (I've seen this before).
'pal' with letters rearranged gives 'pla'.
'pla'+'ted'='PLATED'
'being' acts as a link.
Can you help me to learn more?
(Other definitions for plated that I've seen before include "Given a metal coating" , "Thinly coated with deposited metal" .)