1: Follow south for lecture (5)
4: A revolutionary kind of tire contains a bit of carbide (7)
9: Note old fashioned opening with 2.54 cm bird (9)
10: Fancies and gets hard around (5)
11: Right, turn right to play with robot (3)
12: Exchange recipe describing a small amount of relish on rolled up taco (11)
15: Plan to return with woman (3)
16: Give back wares to retailer's layaway? (7)
17: Pate topping primarily honey and tamari? (3)
18: In the manner of a girl (3)
19: Cost of teaching cooking to Inuit (7)
20: Leaders of Orioles and Rangers stick in the dugout? (3)
23: One politician's a brat (3)
25: Add a letter to get the smell of fish (5)
27: Concluding words: cloning is wrong (2, 7)
29: Tranquillises extremely senile escorts (7)
30: Fires partner in investment firm, we hear (5)