(1d) Touch nerve centre of MS-13 member with pride. (8) ????????.
(5d) Though it can never, by definition, be straight, flatten it out for the builders. (5, 4) ???L? I???.
(8d) Though not even there, tended, in a vague sort of way, to provide the answer. (6, 6)
A???N? ??????.
(13a) Starfish. (6) ??????.
(11a) Leaving a group of musicians on gin cocktails to sort things out without my help. (10) ??????N???