Manly six facing trouble (6)

I believe the answer is:

virile

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'manly' is the definition.
(I know that manly can be written as virile)

'six facing trouble' is the wordplay.
'six' becomes 'VI' (Roman numerals).
'facing trouble' becomes 'rile' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'vi'+'rile'='VIRILE'

Can you help me to learn more?

(Other definitions for virile that I've seen before include "Masculine and macho" , "Red-blooded" , "male" , "Vigorous, manly" , "Manly and macho" .)

I've seen this clue in The Guardian.

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