Leaving to add salt in quiet time (3,6)
I believe the answer is:
off season
'quiet time' is the definition.
'off season' can be an answer for 'time' (I have seen 'Slack time' mean 'off season' so perhaps 'time' could also mean 'off season'). I'm unsure of the 'quiet' bit.
'leaving to add salt' is the wordplay.
'leaving' becomes 'off' ('I'm off' means 'I'm leaving').
'to add salt' becomes 'season' (I've seen this before).
'off'+'season'='OFF-SEASON'
'in' acts as a link.
Can you help me to learn more?
(Other definitions for off season that I've seen before include "Quiet time of year" , "slack period" , "in which cricket sides traverse oceans" , "In less busy time" , "Time of year when business is slackest" .)