Crossword Genius

The Romans imagined him to be two-faced (5)

Ross

I believe the answer is:

janus

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'the romans imagined him to be two-faced' is the definition.
The definition suggests a singular noun which matches the answer.

'him to be two-faced' is the wordplay.
'him' becomes 'Jan'.
'to be two-faced' becomes 'us' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'jan'+'us'='JANUS'

Can you help me to learn more?

(Other definitions for janus that I've seen before include "Two-faced Roman god of doors (5)" , "Two-faced god of gates and doors - Guardian cryptic crossword setter" , "Roman deity who faces front and back" , "Two-faced Roman god who guarded doors and gates" , "Two-faced person" .)

I've seen this clue in the Evening Standard.
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