Group in charge penning a line regarding display of shields (8)
I believe the answer is:
heraldic
'group in charge penning a line regarding display of shields' is the definition.
I can't judge whether this definition defines the answer.
'group in charge penning a line' is the wordplay.
'group' becomes 'herd' (a herd is a group or pack).
'in charge' becomes 'ic' (abbreviation for 'in charge').
'penning' is an insertion indicator.
'line' becomes 'l' (used when specifying particular lines from a poem).
'herd'+'ic'='herdic'
'a'+'l'='al'
'herdic' going around 'al' is 'HERALDIC'.
Can you help me to learn more?
(Other definitions for heraldic that I've seen before include "Of family crests" , "show of arms" , "Relating to officers who register genealogies" , "Of armorial bearings" , "Relating to coats of arms etc" .)