1: Part of book covers ballpark legends, using reliable background sources (5)

3: The age of the equal rights amendment (3)

5: Shinny up and start to cut branch (5)

7: What's left when you burn the tree (3)

8: Instrument making snout feel odd (4,5)

10: Tender command (3)

11: Sacred oratorio includes statement of belief (5)

12: Neither partner finds way out of country (3)

13: City that cowboys used to avoid (5)

1: English philosopher cured pig (5)

2: Multiple notes keeping youth leader youthful (4-5)

3: Hesitation before a certain deletion (7)

4: Residue has scattered (3)

6: Tavern drink for the auditor, one with access to confidential information (7)

9: Rod set up sweetheart to run away together (5)

10: Throw out faulty nib (3)