Securely enclosed marine mammal with talking horse (6)
I believe the answer is:
sealed
'securely enclosed' is the definition.
The definition and answer can be both to do with contact as well as being past participle verbs.
Perhaps there's an association between them I don't understand?
'marine mammal with talking horse' is the wordplay.
'marine mammal' becomes 'seal' (I've seen this in another clue).
'with talking horse' becomes 'ed' (I am not sure about this - if you are sure you should believe this answer much more).
'seal'+'ed'='SEALED'
Can you help me to learn more?
(Other definitions for sealed that I've seen before include "Stamped as authentic" , "Airtight" , "Closed (of lips, envelope, tomb etc)" , "Fastened as in S.W.A.L.K." , "Securely closed" .)