Japanese food English lady eats in the morning (7)
I believe the answer is:
'japanese food' is the definition.
(soybeans eaten in Japan)
'english lady eats in the morning' is the wordplay.
'english' becomes 'e' (abbreviation).
'lady' becomes 'dame' (synonyms).
'eats' is an insertion indicator.
'in the morning' becomes 'am' (AM on a clock).
'dame' enclosing 'am' is 'damame'.
(Another definition for edamame that I've seen is " type of bean".)