Let out or let out again (7)
I believe the answer is:
release
'let out' is the definition.
(synonyms)
'let out again' is the wordplay.
I cannot quite see how this works, but
'again' could be 're' (prefix meaning 'again') and 're' is found in the answer.
'let out' could be 'lease' (I've seen this before) and 'lease' is present in the answer.
No letters remain.
This explanation may well be incorrect...
'or' acts as a link.
Can you help me to learn more?
(Other definitions for release that I've seen before include "record" , "put out" , "Possibly film" , "Issue" , "Authorise publication" .)