Slip perhaps, following one senior person (7)
I believe the answer is:
fielder
'slip' is the definition.
(cricket term)
'following one senior person' is the wordplay.
'following' becomes 'f.' (used when citing page numbers etc).
'one' becomes 'i' (Roman numeral).
'senior person' becomes 'elder' (elder is a kind of person. I am not sure about the 'senior' bit.).
'f'+'i'+'elder'='FIELDER'
'perhaps' is the link.
Can you help me to learn more?
(Other definitions for fielder that I've seen before include "cover, perhaps" , "Cricketer not on batting side" , "One as cover, slip" , "Slip or cover, maybe" , "he might be in a silly position" .)