Closure of pub in old hamlet somehow put on hold (10)
I believe the answer is:
mothballed
'put on hold' is the definition.
(mothball can mean to postpone)
'closure of pub in old hamlet somehow' is the wordplay.
'closure of' says to take the final letters.
'in' means one lot of letters goes inside another.
'somehow' indicates anagramming the letters.
The final letter of 'pub' is 'b'.
'old'+'hamlet'='oldhamlet'
'oldhamlet' is an anagram of 'mothalled'.
'b' placed inside 'mothalled' is 'MOTHBALLED'.
(Another definition for mothballed that I've seen is " put on ice".)