ACROSS
9. (MAGNETIC IRON ORE)* + MICROGENERATION <small-scale production of electricity>
10. _T AME_ = TAMER <more docile>
11. <company handle> TRADE NAME = (TEEN DRAMA)*
12. <natural> UNFEIGNED = F inside GENUINE* D
14. <advice> INPUT = I NUT outside P
15. <irony> SARCASM = SARS outside C_A + M_
17. CO + O KO FF = COOK-OFF <battle at range?>
19. <subject> THEME = THE + ME
20. <lacking integrity> DISHONEST = DISH ON SET*
22. LANCASTER* = ANCESTRAL <been in the family for general>
24. _L A GER_ = LAGER <alcoholic drink>
26. AP PR ENTICES HIP S_ = APPRENTICESHIPS <work programmes>

DOWN
1. <hobbyists> AMATEURS = AS outside (MATE _UR_)
2. ←MACS← = SCAM <phishing, perhaps>
3. <match> COORDINATE = (I DO NOT CARE)*
4. <overpowered> BEATEN = BE A TEN <to have unsurpassably good looks?>
5. (HERD outside AL) IC = HERALDIC <of arms>
6. APE under J = JAPE <joke>
7. <think poorly> DISAPPROVE = (SAP PRO) inside DIVE
8. RENTS* under U = UNREST <discontentment>
13. ←SEER IF← CAPE = FIRE ESCAPE <quick exit>
14. <firebrand> ICONOCLAST = ACTIONS* outside (0 CL_)
16. MODE RATE = MODERATE <middle of the road>
18. <visionary> FUTURIST = (TOURIST - 0) after FU(-n)
19. T RAJA above _N = TRAJAN <emperor>
21. L_ inside SPICE = SPLICE <graft>
23. <luge> SLED = S LED
25. <facile> GLIB = ←BILG(-e)←