Fluid rise complete, predator rampant? (6)

I believe the answer is:

upflow

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'fluid' is the definition.
I don't know anything about this answer so I can't judge whether this works.

'rise complete predator rampant?' is the wordplay.
'rise' becomes 'up' (as a noun).
'complete predator' becomes 'wolf' (I am not sure about the 'complete' bit.).
'rampant?' is a reversal indicator (I've seen 'rampant' mean this (rampant can mean rearing)).
'wolf' in reverse letter order is 'flow'.
'up'+'flow'='UPFLOW'

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