Look — take steps to include supper regularly (6)
I believe the answer is:
aspect
'look' is the definition.
(synonyms)
'take steps to include supper regularly' is the wordplay.
'take steps' becomes 'act' (synonyms).
'to include' means one lot of letters goes inside another.
'regularly' means one should take alternating letters (regularly take one letter, leave next etc.).
The alternate letters of 'supper' are 'spe'.
'act' placed around 'spe' is 'ASPECT'.
(Other definitions for aspect that I've seen before include "'View, perspective (6)'" , "View or facet" , "Scene, look" , "Visual effect" , "Characteristic to be considered" .)