The two-year deal comes just two months following Clarke's release from the Red Devils, where he scored seven goals in 31 appearances last season.
The 27-year-old spent two years at Crawley after spells at Blackpool, Sheffield United and Brentford.
Clarke represented Republic of Ireland at Under-21 level, but has since failed to make a senior appearance.
Restore Data
| Team | P | W | D | L | F | A | GD | PTS | |
| 1 | Gillingham | 8 | 6 | 1 | 1 | 12 | 2 | 10 | 19 |
| 2 | Walsall | 8 | 6 | 0 | 2 | 15 | 4 | 11 | 18 |
| 3 | BarrowBarrow | 8 | 5 | 1 | 2 | 11 | 5 | 6 | 16 |
| 4 | Notts County | 8 | 4 | 3 | 1 | 15 | 8 | 7 | 15 |
| 5 | Port Vale | 8 | 4 | 2 | 2 | 13 | 11 | 2 | 14 |
| 6 | AFC Wimbledon | 6 | 4 | 1 | 1 | 9 | 4 | 5 | 13 |
| 7 | Doncaster RoversDoncaster | 8 | 4 | 1 | 3 | 11 | 12 | -1 | 13 |
| 8 | Crewe AlexandraCrewe | 8 | 4 | 1 | 3 | 8 | 9 | -1 | 13 |
| 9 | Chesterfield | 8 | 3 | 3 | 2 | 13 | 6 | 7 | 12 |
| 10 | Fleetwood TownFleetwood | 7 | 3 | 3 | 1 | 10 | 7 | 3 | 12 |
| 11 | Grimsby Town | 8 | 4 | 0 | 4 | 12 | 14 | -2 | 12 |
| 12 | Newport CountyNewport | 8 | 4 | 0 | 4 | 12 | 16 | -4 | 12 |
| 13 | Bradford CityBradford | 8 | 3 | 2 | 3 | 10 | 9 | 1 | 11 |
| 14 | Harrogate TownHarrogate | 8 | 3 | 1 | 4 | 8 | 11 | -3 | 10 |
| 15 | Colchester UnitedColchester | 8 | 2 | 3 | 3 | 12 | 14 | -2 | 9 |
| 16 | Salford City | 7 | 2 | 3 | 2 | 4 | 6 | -2 | 9 |
| 17 | Tranmere RoversTranmere | 7 | 2 | 3 | 2 | 3 | 7 | -4 | 9 |
| 18 | Bromley | 8 | 2 | 2 | 4 | 10 | 12 | -2 | 8 |
| 19 | MK Dons | 8 | 2 | 2 | 4 | 7 | 10 | -3 | 8 |
| 20 | Cheltenham TownCheltenham | 8 | 2 | 1 | 5 | 9 | 13 | -4 | 7 |
| 21 | Swindon TownSwindon | 8 | 1 | 3 | 4 | 8 | 12 | -4 | 6 |
| 22 | Carlisle UnitedCarlisle | 8 | 2 | 0 | 6 | 10 | 17 | -7 | 6 |
| 23 | Morecambe | 8 | 0 | 3 | 5 | 6 | 11 | -5 | 3 |
| 24 | Accrington StanleyAccrington | 7 | 0 | 3 | 4 | 8 | 16 | -8 | 3 |
| > League Two Full Table | |||||||||
