Phoenix Magazine

[fuzzy-brain]

1d. Do they change trousers, in other words, or provide backing? (7) P _ T _ O _ S.
2d. Though precious from industry's point of view, and from mine, if it's undercooked, heart trouble follows. (4,5) R _ R _ E _ R _ L. The 1st word is probably 'rare' and I'm not certain that my letters are correct. Any ideas?

[bimbo123456]

2d could be rare earth

[JMR27]

1d Patrons - anagram pants + or

[fuzzy-brain]

Thank you both.