Sense there's agreement among rowing men (8)
I believe the answer is:
eyesight
'sense' is the definition.
(sight is a sense)
'agreement among rowing men' is the wordplay.
'agreement' becomes 'yes' (saying yes to something).
'among' is an insertion indicator (inserted letters are placed among others).
'rowing men' becomes 'eight' (I can't explain this - if you can you should give a lot more credence to this answer).
'yes' put into 'eight' is 'EYESIGHT'.
'there's' is the link.
Can you help me to learn more?
(Other definitions for eyesight that I've seen before include "Perceptive faculty" , "Power of vision" , "quality of viewing" , "Seeing faculty" , "Yes, eight required for vision" .)