| Clue | Length | Answer |
|---|---|---|
| Trying | 4 letters | hard |
| Trying | 4 letters | test |
| Trying | 5 letters | esing |
| Trying | 5 letters | rough |
| Trying | 5 letters | tight |
| Trying | 5 letters | trial |
| Trying | 6 letters | tiring |
| Trying | 6 letters | taxing |
| Trying | 7 letters | irksome |
| Trying | 7 letters | r-and-d |
| Trying | 7 letters | testing |
| Trying | 7 letters | onerous |
| Trying | 8 letters | rigorous |
| Trying | 8 letters | toilsome |
| Trying | 8 letters | untoward |
| Trying | 8 letters | sinister |
| Trying | 8 letters | wearying |
| Trying | 8 letters | tiresome |
| Trying | 8 letters | wretched |
| Trying | 8 letters | essaying |
| Trying | 9 letters | vexatious |
| Trying | 9 letters | stressful |
| Trying | 9 letters | straining |
| Trying | 9 letters | wearisome |
| Trying | 9 letters | weakening |
| Trying | 9 letters | tentative |
| Trying | 9 letters | punishing |
| Trying | 9 letters | troublous |
| Trying | 10 letters | attempting |
| Trying | 10 letters | bothersome |
| Trying | 11 letters | provisional |
| Trying | 11 letters | troublesome |
| Trying | 11 letters | takingastab |
| Trying | 11 letters | unfavorable |
| Trying | 12 letters | probationary |
| Trying | 13 letters | rule-of-thumb |
| Trying | 15 letters | trial-and-error |
| Trying | 24 letters | research-and-development |
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