Calm point about being amenable (9)
I believe the answer is:
compliant
'amenable' is the definition.
(similar in meaning)
'calm point about' is the wordplay.
'about' indicates anagramming the letters.
'calm'+'point'='calmpoint'
'calmpoint' anagrammed gives 'COMPLIANT'.
'being' acts as a link.
(Other definitions for compliant that I've seen before include "Accommodating" , "Manageable" , "Complaint about being obedient" , "Subservient" , "Obliging" .)