Acted outside in the morning with acceptable suit (7)
I believe the answer is:
diamond
'suit' is the definition.
'acted outside in the morning with acceptable' is the wordplay.
'acted' becomes 'did' (I've seen this before).
'outside' indicates putting letters inside.
'in the morning' becomes 'am'.
'with' is a charade indicator (letters next to each other).
'acceptable' becomes 'on' (I've seen this in other clues).
'am'+'on'='amon'
'did' placed around 'amon' is 'DIAMOND'.
(Other definitions for diamond that I've seen before include "Hard precious stone" , "Something precious" , "Red card" , "American field" , "60th anniversary" .)