Working for good man seen on winter mornings (5)

I believe the answer is:

frost

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

'winter mornings' is the definition.
'frost' can be an answer for 'winter' (thesaurus). I'm unsure of the 'mornings' bit.

'working for good man' is the wordplay.
'working' indicates an anagram.
'good man' becomes 'st' (abbreviation for saint).
'for' is an anagram of 'fro'.
'fro'+'st'='FROST'

'seen on' acts as a link.

Can you help me to learn more?

(Other definitions for frost that I've seen before include "Rime" , "RD Wingfield's detective" , "Hoar" , "Robert ---, US poet" , "Icy deposit" .)

I've seen this clue in The Daily Express.

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.