Losing face, Holst struggles with Mars? Yes, in arrangement of The Planets (5,6)

I haven't cracked this one yet — but the brilliant team at Times for the Times have:

Another pretty thematic clue. Take the H face from HOLST, add MARS and YES, anagram the result. Does anyone not know that Gustav Holst wrote The Planets Suite which includes the mesmerising “Mars” with its belligerent, pounding beat?