One fleeced by second person over the phone (3)
I believe the answer is:
ewe
'one fleeced' is the definition.
I can't tell whether this definition defines the answer.
'second person over the phone' is the wordplay.
'second person' becomes 'you' (second person pronoun).
'over the phone' indicates a 'sounds like' (homophone) clue (how it might sound over the phone).
'you' sounds like 'EWE'.
'by' acts as a link.
Can you help me to learn more?
(Other definitions for ewe that I've seen before include "Partner to ram" , "Dam of a sheep" , "Lamb's mother" , "Female on farm" , "Scottish loch" .)