In the morning, allow to be easily persuaded (8)
I believe the answer is:
amenable
'be easily persuaded' is the definition.
(I've seen this before)
'in the morning allow' is the wordplay.
'in the morning' becomes 'am' (short for ante meridiem - before noon).
'allow' becomes 'enable' (I've seen this in another clue).
'am'+'enable'='AMENABLE'
'to' acts as a link.
(Other definitions for amenable that I've seen before include "Open and responsive to suggestion" , "Nameable as being willing to be controlled" , "Easily handled" , "Ready to accept" , "Helpful" .)