Scored having picked up fellow outside gallery (7)
I believe the answer is:
notated
'scored' is the definition.
Both the definition and answer are past participle verbs.
Perhaps there's a link between them I don't understand?
'picked up fellow outside gallery' is the wordplay.
'picked up' says the letters should be written in reverse.
'fellow' becomes 'don' (I've seen this before).
'outside' means one lot of letters goes inside another.
'gallery' becomes 'tate' (I've seen this before).
'don' backwards is 'nod'.
'nod' going around 'tate' is 'NOTATED'.
'having' acts as a link.
Can you help me to learn more?
(Other definitions for notated that I've seen before include "Set down in symbols" , "wrote music?" , "Written like a music score" , "Marked" , "commented on" .)