Crossword Genius

Blow that's justified to a private captain? (5,4)

Ross

I believe the answer is:

right hook

I'm a little stuck... Click here to teach me more about this clue!

'blow' is the definition.
I don't know anything about this answer so I cannot tell whether it can be defined by this definition.

'justified to a private captain?' is the wordplay.
'justified' becomes 'right ' (I've seen this before).
'to' says to put letters next to each other.
'a private captain?' becomes 'hook' (I've seen this before. I am not sure about the 'private' bit.).
'right'+'hook'='RIGHT HOOK'

'that's' is the link.

Can you help me to learn more?

I've seen this clue in The Globe and Mail.
Want a hint initially instead of a full solution? Install my app