Seven unclued lights are words that may be regarded as 13 18.  The remaining unclued light supplies the material with which, in normal clue order, the 18 are 13. Elsewhere, ignore an accent.

Across

4 Rags, acceptable kind, around revolving stand (9)
10 Mind being occupied by time in places where ships are repaired (10)
12 Yellow element, not black, in scarf (7)
14 Hope stirred by right class of magistrates (5)
15 Chance to hold Anglo-Norman goblet (5)
16 So, after...