Change one letter in the first word to get the answer to the second. OR, change one letter in the second word to get the answer to the first. No anagramming.
Example: puzzle > card game = poser > poker
-1. build > humus (7)
-2. word after sand > word after sand (5)
-3. brief > taut (5)
-4. tease > thrash (6)
-5. live wire > engine part (6)
-6. portion > vacuum force (7)
-7. subservient > psychological (6)
-8. calm > set (6)
-9. safeguard > cordial (6)
-10. tease > become inflamed (6)
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Did you ever stop to think and then forget to start again?