Root reckless at first, declaring; India will be put in (6)
I believe the answer is:
radish
'root' is the definition.
(radish is a kind of root)
'reckless at first declaring india will be put in' is the wordplay.
'reckless' becomes 'rash' (synonyms).
'at' says to put letters next to each other.
'first declaring' becomes 'd' (ist letter of 'declaring').
'india will' becomes 'i' (I can't justify this - if you can you should give a lot more credence to this answer).
'be put in' indicates putting letters inside.
'd'+'i' is 'di'.
'rash' enclosing 'di' is 'RADISH'.
Can you help me to learn more?
(Other definitions for radish that I've seen before include "Pungent fleshy edible root eaten in salads" , "Plant with crisp root eaten raw" , "Pungent red salad root" , "Sir had this vegetable" , "Edible small root" .)