Cryptic crossword No 2,921

Across

1. One is into patriotic song - one vehemently disliked! (8)
2. Five grand for low-grade render (4)
3. Nothing embraced by deity is positive (4)
4. Recall about going to part of a party (6)
5. Two or three, perhaps, care for leader (5,8)
6. First in mad scheme to get into cement not about to get work (10)
7. Badger's home, explores room initially, finding dog (6)
8. Nothing new to note - unknown creates study of the nature of being (8)
9. Seaside town comes from a right mess originally in childhood (8)
10. Some mag outing fur (6)
11. Alien vehicle returns - starts to rapidly implement abduction for infectious beings (8)
12. Reason French duke in river (6)
13. Rarest ribs cooked for wig-wearers? (10)

Down

1. After preparation, reapply oat mix roughly (13)
2. Practise on bottom with the man inserted (8)
3. I use robots - agile and disruptive! (10)
4. Good argument for raise! (4)
5. "Some swear us Siam" - country in Asia (6)
6. Money gained from home company set up by yours truly (6)
7. Eat green salad for youth (8)
8. Understudy hides a lover? (4)
9. Five in London? One goes in Gap (6)
10. Deviant adult times - excited! (10)
11. Woman paid for her company corset to be altered (6)
12. Group of businesses go after independent America (8)
13. Hang around Los Angeles in gym, finding group in uniform? (8)