Curiously I’d oil peacocks giving wonderful colour effects (13)
I believe the answer is:
kaleidoscopic
'curiously i'd oil peacocks giving wonderful colour effects' is the definition.
I can't tell whether this definition defines the answer.
'curiously i'd oil peacocks' is the wordplay.
'curiously' indicates an anagram.
'id'+'oil'+'peacocks'='idoilpeacocks'
'idoilpeacocks' with letters rearranged gives 'KALEIDOSCOPIC'.
Can you help me to learn more?
(Other definitions for kaleidoscopic that I've seen before include "Showing constant change (of colours?)" , "Multi-coloured" , "Showing changing colours" , "constantly changing in form" .)