Crossword Genius

River banks needing water still (5)

Ross

I believe the answer is:

photo

I'm a little stuck... Click here to teach me more about this clue!

'still' is the definition.
(I've seen this before)

'river banks needing water' is the wordplay.
'river' becomes 'Po' (Italian river).
'banks' indicates putting letters inside (bank can mean to surround or border).
'needing water' becomes 'hot' (I am not sure about this - if you are sure you should believe this answer much more).
'po' placed around 'hot' is 'PHOTO'.

Can you help me to learn more?

(Other definitions for photo that I've seen before include "Snap, exposure, in short" , "Snap, picture" , "Picture (abbr)" , "Snap (abbrev.)" , "In brief, a snapshot" .)

I've seen this clue in The Sunday Times and The Times.
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