Increased some of the meagre water supplies (4)

I believe the answer is:

grew

'increased' is the definition.
(growing is a kind of increasing)

'some of the meagre water supplies' is the wordplay.
'some of' indicates the answer is hidden within the clue.
'GREW' is hidden within 'meagre water supplies'.

(Other definitions for grew that I've seen before include "Rose" , "Expanded - flourished" , "Increased in size" , "Got larger" , "Developed, matured" .)

I've seen this clue in The Irish Independent.

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