1) It all starts here. Chin-chin! (8)
2) Meanders behind (7)
3) 50+mammal (10)
4) Front of an articulated lorry (7)
5) Long-distance water travel, big hole without 19 (9,5)
//The term (UK) of "articulated lorry" refers to the combination of a front part which pulls (the "tractor") and a rear part which follows (the "trailor").//