Weather feature depicted by artist in East London area (7)
I believe the answer is:
rainbow
'weather feature' is the definition.
(I've seen this before)
'artist in east london area' is the wordplay.
'artist' becomes 'RA' (Royal Academician, member of Royal Academy of Arts).
'east london area' becomes 'Bow' (district of East London).
'ra'+'in'+'bow'='RAINBOW'
'depicted by' is the link.
(Other definitions for rainbow that I've seen before include "Whole range of colours" , "colours in the sky" , "'I can sing a - - ' (song)" , "Colourful phenomenon" , "Natural multicoloured arc" .)