Rich source of water listed (4-6)

I believe the answer is:

well-heeled

'rich' is the definition.
(similar in meaning)

'source of water listed' is the wordplay.
'source of water' becomes 'well' (water may come from a well).
'listed' becomes 'heeled' (both can mean leaned or tipped).
'well'+'heeled'='WELL-HEELED'

(Other definitions for well-heeled that I've seen before include "Wealthy" , "Affluent" , "Comfortably off" , "Prosperous, rich" .)

I've seen this clue in The Independent.

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