East End artist produces colourful display? (7)
I believe the answer is:
rainbow
'colourful display?' is the definition.
(I've seen this before)
'east end artist' is the wordplay.
I cannot quite see how this works, but
'artist' could be 'ra' (Royal Academician, member of Royal Academy of Arts) and 'ra' is found in the answer.
This may be the basis of clue (or it may be nonsense).
'produces' is the link.
Can you help me to learn more?
(Other definitions for rainbow that I've seen before include "Type of trout" , "Spectral display" , "Multi-coloured arc in the sky" , "'I can sing a - - ' (song)" , "an impossible dream being chased?" .)