Crossword Genius

For a start, I have to rewrite the passage (6)

Ross

I believe the answer is:

strait

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

'passage' is the definition.
(I've seen this before)

'for a start i have to rewrite' is the wordplay.
'start i' anagrams to 'STRAIT'.
Though, I'm not clear how the anagram is indicated.

'the' is the link.

Can you help me to learn more?

(Other definitions for strait that I've seen before include "of Gibraltar, for example" , "Sound" , "Connecting passage of water" , "Narrow stretch of sea" , "Difficulty - strict" .)

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