Do I have the power to be pleasant (7)
I believe the answer is:
amiable
'pleasant' is the definition.
(I know that pleasant can be written as amiable)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for amiable that I've seen before include "Friendly, kindly" , "Of sweet and friendly disposition" , "Charming" , "'Cordial, friendly (7)'" , "Friendly and good-natured (7)" .)