That's it.
Immersed in pleasure, embracing the loose, good heavens! so much dust! (6)
WORDPLAY
immersed in pleasure [charade] = gay
embracing [indicator:container/insertion]
loose [charade] = lax
... GAY with lax inserted = GAlaxY
DEFINITION
good heavens! so much dust! = galaxy (part of the heavens, much of which is interstellar dust)
Over to you.
