Blaise, perhaps, having way with pen (7)
I believe the answer is:
modesty
'blaise perhaps' is the definition.
(comic strip character Modesty Blaise)
'way with pen' is the wordplay.
'way' becomes 'mode' ('mode' can be a synonym of 'way').
'with' says to put letters next to each other.
'pen' becomes 'sty' (sty is a kind of pen).
'mode'+'sty'='MODESTY'
'having' acts as a link.
(Other definitions for modesty that I've seen before include "Decorum, shyness" , "Unassuming quality" , "Unassuming character" , "Quality of being unpretentious" , "Reserve" .)