| Clue | Source | Date |
|---|---|---|
| Forefront (of technological development) (7,4) | ||
| Front of wing obtained from jumble gained in shelf (7,4) | ||
| Forefront | USA Today | 21 Feb 2020 |
| 'Vanguard' idle -- engaged with refitting | The Telegraph Toughie | 12 Oct 2017 |
| Forefront, as of innovation | USA Today | 26 May 2017 |
| Forefront, as of innovation | ||
| Forefront, as of technology | ||
| Forefront, as of technology |