7 Down has wordplay to only half its grid entry. The undefined part is the first word of a 9-word description, in ODQ. Ignore all hyphens. The unclued lights can be arranged to form the full description.

Across

1 Good over – nearly more than one, in truth (6)
7 Strain to keep daughter in plaits once (6)
11 Studied alternative for second endorsement (10)
13 Dickens was upset (5)
14 Delicate but not frequently moving supply (5)
15 Ultimately explosive danger, if it goes off? (7)
18 Vessel carrying old, dark spirits (6)
19 Make some characters kind...