... present with voucher - losing business immediately (9)
I believe the answer is:
thereupon
'immediately' is the definition.
Both the answer and definition are adverbs. Perhaps you can see an association between them that I can't see?
'present with voucher losing business' is the wordplay.
'present' becomes 'there' (someone present somewhere is 'there').
'with' says to put letters next to each other.
'voucher' becomes 'coupon' (synonyms).
'losing' indicates named letters should be taken away.
'business' becomes 'co' (short for company).
'coupon' with 'co' removed is 'upon'.
'there'+'upon'='THEREUPON'
Can you help me to learn more?
(Other definitions for thereupon that I've seen before include "straightaway" , "straight afterwards" , "Shortly after that" , "immediately after that" , "at that point" .)