Devoted king stamps a deed (7)
I believe the answer is:
adoring
'devoted' is the definition.
(I've seen this in another clue)
'king stamps a deed' is the wordplay.
I cannot really understand how this works, but
'king' could be 'r' (abbreviation for rex, king in Latin) and 'r' is found in the answer.
'a' is within the answer.
The remaining letters 'doing' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for adoring that I've seen before include "Worshipful" , "Passionate" , "Giving great love" , "Worshipping the loved one" , "Holding dear" .)