Sense agreement amongst rowing crew (8)
I believe the answer is:
eyesight
'sense' is the definition.
(eyesight is a kind of sense)
'agreement amongst rowing crew' is the wordplay.
'agreement' becomes 'yes'.
'amongst' means one lot of letters goes inside another (I've seen this in other clues).
'rowing crew' becomes 'eight' (I've seen this before).
'yes' placed into 'eight' is 'EYESIGHT'.
(Other definitions for eyesight that I've seen before include "What's needed to see" , "Seeing ability" , "perception" , "Showing sense" , "quality of viewing" .)