I was right to start tending elderly sheep, say (4,3)

'i was right' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.

'start tending elderly sheep say' is the wordplay.
'start' indicates taking the first letters.
'elderly' becomes 'old' (similar in meaning).
'sheep' becomes 'ewe' (a ewe is a female sheep).
'say' shows a homophone (sound like).
The first letter of 'tending' is 't'.
'ewe' is a homophone of 'you'.
't'+'old'+'you'='TOLD YOU'

'to' is the link.

Can you help me to learn more?