Please could someone help me with the following?
16 across Sexy group first to leave during streak (7) ?A?N?H? (I'm pretty sure it's raunchy - (b)unch in ray, but don't understand why ray is a streak.
23 across Start to openly lecture mill about smell (9) ???A?T???
17 down Understood about university having yen for mischief (7) ?O?U???
19 down Bad place offering initial salutation (5) ?E???
Thanks in advance