Artist in decline - depression causing this? (8)

I believe the answer is:

rainfall

'depression causing this?' is the definition.

'artist in decline' is the wordplay.
'artist' becomes 'ra' (Royal Academician, member of Royal Academy of Arts).
'decline' becomes 'fall' ('fall' can be a synonym of 'decline'**).
'ra'+'in'+'fall'='RAINFALL'

(Other definitions for rainfall that I've seen before include "Precipitation, get out umbrella" , "Shower" , "Climate measure" , "Water falling in drops" , "Form of precipitation" .)

I've seen this clue in The Telegraph.

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