In the mail, ostensibly, never delivered (4)
I believe the answer is:
lost
'delivered' is the definition.
The answer and definition can be both related to bodily activities as well as being past participle verbs.
Maybe there's an association between them I don't understand?
'in the mail ostensibly never' is the wordplay.
'in' indicates a hidden word.
'LOST' is hidden within 'mail ostensibly never'.
Can you help me to learn more?
(Other definitions for lost that I've seen before include "Missing" , "Mislaid or was defeated" , "See 10" , "Unable to find the way forward" , "Mogul empire official; rich person" .)