Crossword Genius

Beastly types from trendy post offices (6)

Ross

I believe the answer is:

hippos

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

'beastly types' is the definition.
Although both the answer and definition are plural nouns, I cannot understand how one could define the other.

'trendy post offices' is the wordplay.
'trendy' becomes 'hip' (I've seen this in other clues).
'post offices' becomes 'pos' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'hip'+'pos'='HIPPOS'

'from' is the link.

Can you help me to learn more?

(Other definitions for hippos that I've seen before include "African natives" , "River horses" .)

I've seen this clue in the Irish Times.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.