Temp visibly embarrassed to be welcomed by greeting cards (5,4)

'temp' is the definition.
The answer and definition can be both people as well as being singular nouns.
Perhaps there's an association between them I don't understand?

'visibly embarrassed to be welcomed by greeting cards' is the wordplay.
'visibly embarrassed' becomes 'red'.
'to be welcomed by' means one lot of letters goes inside another (I've seen this in other clues).
'greeting' becomes 'hi' (hi is a kind of greeting).
'cards' becomes 'hand' (I've seen this in other clues).
'hi'+'hand'='hihand'
'red' going within 'hihand' is 'HIRED HAND'.

Can you help me to learn more?