Men cower, all of a shiver, seeing stranger (8)

I believe the answer is:

newcomer

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

'stranger' is the definition.
(thesaurus)

'men cower all of a shiver' is the wordplay.
'men cower' anagrams to 'NEWCOMER'.
Though, I'm not sure how the anagram is indicated.

'seeing' acts as a link.

Can you help me to learn more?

(Other definitions for newcomer that I've seen before include "Recent arrival" , "Late arrival" , "Immigrant" , "Fresh arrival" , "Starter" .)

I've seen this clue in The Sun.

Want a hint initially instead of a full solution? Install my app