Losing face, Holst struggles with Mars? Yes, in arrangement of The Planets (5,6)
I believe the answer is:
solar system
'arrangement of the planets' is the definition.
Although both the answer and definition are singular nouns, I cannot see how they can define each other.
'losing face holst struggles with mars? yes' is the wordplay.
'losing face' means to remove the first letter.
'struggles with' indicates an anagram.
'holst' with its initial letter taken away is 'olst'.
'mars'+'yes'='marsyes'
'olst' anagrammed with 'marsyes' gives 'SOLAR SYSTEM'.
'in' acts as a link.
Can you help me to learn more?
(Other definitions for solar system that I've seen before include "Sun and the planets collectively" , "The sun and its associated bodies" , "What's held together by the Sun" , "Sun, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto" , "Bodies around heater" .)