Would appreciate help on these cryptic clues on things found at the seaside.
18 To Deceive
20 Boxer from the 1950's
30 Escaped prisoners may need to do this
31 Ship used by addicts
34 Burrowing animal
35 Gritty saliva
36 Where the seawife keeps her cash
48 Petrol
49 South Sea Island
51 Southern Witch
Thanks in advance for any help