### Clue: across Temporarily transfer worker to grass it's growing on the 24 (6-4,4)
### Answer: SECOND-HAND SHOP 
 ### Explanation: Definition: it's growing on the 24
 SECOND(to temporarily transfer a worker to other employment or another department) + HAND(a worker, especially one doing manual work) + SHOP(like "grass", slang for "to inform on someone").
Defn: More of this type of store are opening up in the High Street;answer to 24 across.