Paper capturing expert angle (5)
I believe the answer is:
facet
'angle' is the definition.
(I've seen this before)
'paper capturing expert' is the wordplay.
'paper' becomes 'ft' (newspaper the FT, Financial Times).
'capturing' means one lot of letters goes inside another.
'expert' becomes 'ace' (ace can informally mean very good).
'ft' placed around 'ace' is 'FACET'.
(Other definitions for facet that I've seen before include "side of rock" , "view" , "Flat surface on a cut gem" , "Gem's cut side" , "Smooth surface of a gem" .)