The business starts practice with debts abundant (7)
I believe the answer is:
copious
'abundant' is the definition.
(similar in meaning)
'the business starts practice with debts' is the wordplay.
'the business' becomes 'co' (short for company).
'starts' says to take the initial letters.
'with' says to put letters next to each other.
'debts' becomes 'IOUs' (promises to pay debts).
The first letter of 'practice' is 'p'.
'co'+'p'+'ious'='COPIOUS'
(Other definitions for copious that I've seen before include "good measure" , "Providing loads of" , "Plentiful, existing in large amounts" , "full" , "Redundant" .)