Rob Ted perhaps - he owes! (6)
I believe the answer is:
debtor
'he owes' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'rob ted perhaps' is the wordplay.
'perhaps' is an anagram indicator.
'rob'+'ted'='robted'
'robted' anagrammed gives 'DEBTOR'.
Can you help me to learn more?
(Other definitions for debtor that I've seen before include "Borrower" , "Someone owing money" , "One who owes money" , "Anyone owing money" , "Opposite of creditor" .)