Swede covered in sauce needs stalk for heavenly arrangement? (5,6)
I believe the answer is:
solar system
'heavenly arrangement?' is the definition.
(arrangement of heavenly bodies)
'swede covered in sauce needs stalk' is the wordplay.
'swede' becomes 'Lars' (common Swedish name).
'covered in' means one lot of letters goes inside another.
'sauce' becomes 'soy' (soy sauce).
'needs' means one lot of letters go next to another.
'stalk' becomes 'stem' (synonyms).
'lars' placed inside 'soy' is 'solarsy'.
'solarsy'+'stem'='SOLAR SYSTEM'
'for' acts as a link.
(Other definitions for solar system that I've seen before include "Sun, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto" , "Sun and the planets collectively" , "Bodies around heater" , "The sun and its associated bodies" , "Arrangement of planets around a sun" .)