Yours truly upset with order about Imprint, so it stands out (6)
I believe the answer is:
emboss
'imprint so it stands out' is the definition.
I can't judge whether this definition defines the answer.
'yours truly upset with order' is the wordplay.
'yours truly' becomes 'me' (the person that set this crossword).
'upset' says the letters should be written in reverse.
'with' says to put letters next to each other.
'order' becomes 'boss' (I've seen this in another clue).
'me' written backwards gives 'em'.
'em'+'boss'='EMBOSS'
'about' acts as a link.
Can you help me to learn more?
(Other definitions for emboss that I've seen before include "Print in relief" , "Produce a relief design" , "Carve figure in relief" , "Provide relief" , "Decorate with raised design (6)" .)