A man to anger with an early Christmas present (12)
I believe the answer is:
frankincense
'christmas present' is the definition.
(I've seen this before)
'a man to anger' is the wordplay.
'a man' becomes 'frank' ().
'to anger' becomes 'incense' (to incense is make angry).
'frank'+'incense'='FRANKINCENSE'
'with an early' is the link.
This may not be correct. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for frankincense that I've seen before include "Gift of one of the Magi" , "present at birth" , "Source of pleasant scent" , "Christmas gift" , "One of the Magi's gifts" .)