Polymath 661

[Crackabilly]

1d Small lunar impact crater named after British astronomer (4) W?S?
2d Ecclesiastical site in Rome (7) L?E?R?A
4d Terminating in an abrupt taper, especially at the end of a leaf (9) M?C?O?D?E
14d Atlanic fish related to the mackerel (4) ?A?D
Any help appreciated

[Lie-in King]

1d Webb
2d Lateran
4d Mucronate
14d Scad

[Crackabilly]

Many thanks Lie-in King!
Looks like my 14a & 15a are well out