2111: Father figures

When paired, the unclued lights (one hyphened) are of a kind. Ignore two accents. (The solution at 15D is not listed in Chambers and that at 36D only at its definition.)
 
Across
3    Global popularity of a lecturer in Keele, say (12)
13    Covered pathways badly made inside, unfortunately (8)
18    Race-course records medal (5)
19    Forced Alan to be involved with U-turn (9)
22    Chemical company is here in France (3)
24    Endless yearning to embrace secretary causing gloom (7)
25    Allowed fellow to enter, then departed (4)
26    Would it provide some relief and relaxation? (7)
28    Novel resort in Arden? (7)
30    Fret about loads of money (4)
32    One African leader imprisoned by strange metal (7)
33    Friendly goblin lives with knight (3)
35    A leading Kent bowler brought round sail (9)
37    Port and cake (5)
41    Unusually active, fitting bit of tracery in hollowed mouldings (7)
42    Go back into dens for cigars (7)
43    Section of newspaper that’s secret nowadays (12, two words)
 
Down
1    Trips around base stables (12)
2    Dip during drink — like some Italian food ideally (7, two words)
4    Relative from Solway town, upset (5)
5    Bird may be true after crude love is resurrected (7)
6    It’s inclined to increase (4)
8    Covers for nets (5)
9    Football action at no extra cost? (7, two words)
14    The Body’s short measure (3)
15    Bawdy behaviour of MEP involved with prisoners (12)
17    A6 installed with some class lighting (7, hyphened)
20    Active daughter, aggravated, we’re told, by tissue (7)
23    Irish worker in prison upset pests (9)
27    Wenger loses a little enthusiasm with a novice in his team (7)
29    Notched studio gallery (7)
31    Monitor bishop’s position (7)
34    Poet showing hesitancy with his replies? (5)
35   ...