If I take the Magic Initiate feat and choose a different class's spell list, but pick a spell that's also on my class's spell list, can I cast it using my class's spell slots?
I have read this question and answer: Can you cast a magic initiate spell using spell slots?
If a Druid takes the Magic Initiate feat, choosing the Cleric list, and takes a spell that's on both lists (such as Healing Word), can they cast that shared spell taken from the Cleric list with their class's spell slots?
The following leads me to think this is subtly different: the previous question dealt with a wizard taking a spell that was not a wizard spell. It was Not On His List. The Druid is taking a Druid spell off the Cleric list; it is still a Druid spell and available for the Druid to prepare.
Best Answer
No
As the the Sage Advice Compendium ruling states:
The fact that the same spell appears on your druid spell list doesn't change that. You can still prepare and cast it as a druid, but you can't use druid spell slots to cast it when you only have it available via the Magic Initiate feat.