Inscription, say, included in loan (6)
I believe the answer is:
legend
'inscription' is the definition.
(I've seen this before)
'say included in loan' is the wordplay.
'say' becomes 'eg'.
'included in' means one lot of letters goes inside another.
'loan' becomes 'lend' ('lend' can be a synonym of 'loan').
'eg' inserted inside 'lend' is 'LEGEND'.
(Other definitions for legend that I've seen before include "Celebrity" , "hero" , "Stanley Matthews, perhaps" , "Person who has become famous" , "Old tale" .)