Nasty look securing newspaper worker for Punch (4-6)
I believe the answer is:
left-hander
'punch' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.
'nasty look securing newspaper worker' is the wordplay.
'nasty look' becomes 'leer' (I've seen this in another clue).
'securing' means one lot of letters goes inside another.
'newspaper' becomes 'FT' (Financial Times newspaper).
'worker' becomes 'hand' (hand is a kind of worker).
'ft'+'hand'='fthand'
'leer' enclosing 'fthand' is 'LEFT-HANDER'.
'for' acts as a link.
Can you help me to learn more?
(Another definition for left-hander that I've seen is " Sinister operative".)