Completed getting registered and decorated (7)
I believe the answer is:
frilled
'decorated' is the definition.
(similar in meaning)
'completed getting registered' is the wordplay.
I cannot really see how this works, but
'registered' could be 'r' (abbreviation, as in registered trademark) and 'r' is found within the answer.
The remaining letters 'filled' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
'and' acts as a link.
Can you help me to learn more?
(Another definition for frilled that I've seen is " With ruff".)