Thanks for this Jolan.
Been very fortunate recently to be able to indulge on Tuesdays and have the delight of your brain gym.
Here is my stab at today's clues.
1. Bag containing a spinach (4)- SAAG?
Sag – to “bag”, with “a” gives saag – in Chambers as “spinach”?
2. A single with its associated set are past performance (5,6) TRACK RECORD?
A single – “track” as a single piece on its associated set – a record, giving track record- past performance?
3. India rubber tree about to fall back to a former state - green earth (5,5)- TERRE VERTE?
Tree about, anagram of tree, around “revert” gives Terre verte- a green earth pigment used in painting?
4. Patience, possibly, is the thing that is important (3,4,2,3,4)- THE NAME OF THE GAME? Patience is the “name of the game” and the “name of the game” is the most important thing?
5. Experiment encapsulating contact carrying guaranteed source of wealth (8,5)- TREASURE CHEST?
Experiment – test encapsulating contact – reach and carrying guaranteed- sure – t rea sure ch est- source of wealth?
Thanks again,
AB