Drifting round the bend and into coin-operated casing (7)
I believe the answer is:
nomadic
'drifting' is the definition.
(thesaurus)
'into coin-operated casing' is the wordplay.
'into' means one lot of letters goes inside another.
'operated' indicates an anagram.
'casing' becomes 'mad' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'coin' with letters rearranged gives 'noic'.
'noic' going around 'mad' is 'NOMADIC'.
'round the bend and' is the link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for nomadic that I've seen before include "vagrant" , "Migratory" , "Homeless - wandering" , "Given to wandering, like travelling tribes" , "migrant" .)