River current beginning to deceive American (5)
I believe the answer is:
indus
'river' is the definition.
(Indus is an example)
'current beginning to deceive american' is the wordplay.
'current' becomes 'in' (I've seen this in other clues**).
'beginning to' suggests taking the first letters.
'american' becomes 'us'.
The initial letter of 'deceive' is 'd'.
'in'+'d'+'us'='INDUS'
(Other definitions for indus that I've seen before include "River of India and Pakistan" , "River of India/Pakistan" , "Pakistani river" , "running water" , "Main river of Pakistan" .)