Clue: Ant 'n' Dec say really good jokes without cracking (2-7)
Answer: CO-WORKERS
Explanation: Definition: Ant 'n' Dec say

**W/O** (without) *cracking* **CORKERS** ("really good jokes") 
 

 
*For the benefit of non-Brits, Ant 'n' Dec are a pair of TV presenters who are rarely seen apart.