His employer being out for half an hour, he’ll give a loan (6)
I believe the answer is:
usurer
'he'll give a loan' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'his employer being out for half an hour' is the wordplay.
'his employer' becomes 'user'.
'being out' means one lot of letters goes inside another.
'for' becomes 'u' (I can't justify this - if you can you should give a lot more credence to this answer).
'half' means to take half the letters.
'an hour' becomes 'hr' ('hr' can be a synonym of 'hour').
'hr' cut in half is 'r'.
'u'+'r'='ur'
'user' enclosing 'ur' is 'USURER'.
Can you help me to learn more?
(Other definitions for usurer that I've seen before include "Shylock, say" , "source of interest" , "Shylock, for example" , "One who charges excessive interest" , "One who exacts much interest on loans." .)