I have an answer for 1d, Boulders get smelly but are very sturdy.
My letters are *O*K *O*I*
The first 5 letters of my answer match 'boulders', and my complete answer matches 'very sturdy', but where does 'smelly' come into it?
It would need to match the O*I* part of the answer the way I have read the clue.
(Deliberately not given my answer, to avoid spoiling it for anyone looking for help but not answers)