Faculty certainly welcomed by rowing team (8)
I believe the answer is:
eyesight
'faculty' is the definition.
(eyesight is a kind of faculty)
'certainly welcomed by rowing team' is the wordplay.
'certainly' becomes 'yes' (I've seen this before).
'welcomed by' is an insertion indicator (I've seen this in other clues).
'rowing team' becomes 'eight' (I've seen this in other clues).
'yes' inserted within 'eight' is 'EYESIGHT'.
(Other definitions for eyesight that I've seen before include "Seeing ability" , "Power of vision" , "View" , "quality of viewing" , "What's needed to see" .)