Snapper, like one on river (7)

I believe the answer is:

digicam

'snapper' is the definition.
(something that takes snaps cryptically)

'like one on river' is the wordplay.
'like' becomes 'dig' (I've seen this in another clue).
'one' becomes 'i' (Roman numeral).
'on' says to put letters next to each other.
'river' becomes 'cam' (river in Cambridge, England).
'dig'+'i'+'cam'='DIGICAM'

(Another definition for digicam that I've seen is " Device for taking and storing moving images".)

I've seen this clue in The Telegraph.

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