Settled down after leaving medical centre, perhaps (6)
I believe the answer is:
'settled down' is the definition.
(I've seen this in another clue)
'leaving medical centre perhaps' is the wordplay.
I cannot quite see how this works, but
'medical' could be 'med' (abbreviation) and 'med' is found within the answer.
The remaining letters 'cal' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
'after' acts as a link.
Can you help me to learn more?
(Other definitions for calmed that I've seen before include "Soothed" , "Made peaceful, pacified" , "Pacified, dispelled anger" , "Placated, made peaceful" , "Made tranquil and quiet" .)