Pick up pair reportedly connected to this matter (6)
I believe the answer is:
hereto
'to this matter' is the definition.
(I've seen this before)
'pick up pair reportedly' is the wordplay.
'pick up' becomes 'here' (I can't justify this - if you can you should give a lot more credence to this answer).
'pair' becomes 'two' (a pair means two of something).
'reportedly' shows a homophone (sound like).
'two' is a homophone of 'to'.
'here'+'to'='HERETO'
'connected' acts as a link.
I am not very happy about this link. It may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for hereto that I've seen before include "To this place or time" , "To this document, in legal jargon" , "(Appended) to this document" , "so far" , "To this writing or document, in legalese" .)