Name the prison (4)
I believe the answer is:
nick
'prison' is the definition.
(slang)
'name' is the wordplay.
I cannot quite understand how this works, but
'name' could be 'n' (common abbreviation e.g. on forms) and 'n' is found within the answer.
The remaining letters 'ick' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
'the' acts as a link.
Can you help me to learn more?
(Other definitions for nick that I've seen before include "Clink" , "where thieves are" , "jail" , "Steal (informal)" , "jug" .)