Crossword Genius

Wet weather, costly we hear for forest dwellers? (8)

Ross

I believe the answer is:

reindeer

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

'wet weather' is the definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.

'costly we hear for forest dwellers?' is the wordplay.
'costly' becomes 'dear' (synonyms).
'we hear' shows a homophone (sound like).
'for' says to put letters next to each other (I've seen this in other clues).
'forest dwellers?' becomes 'rein' (I can't justify this - if you can you should believe this answer much more).
'dear' is a homophone of 'deer'.
'deer' put after 'rein' is 'REINDEER'.

Can you help me to learn more?

(Other definitions for reindeer that I've seen before include "Eg, caribou" , "Animal that pulls Santa's sleigh" , "seasonal transporter" , "wild animal" , "Santa's Prancer, say" .)

I've seen this clue in The Telegraph.
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