Gently boils some carrots, immersed (7)

I believe the answer is:
simmers
'gently boils' is the definition.
'simmers' can be an answer for 'boils' (simmering is a kind of boiling). I'm unsure of the 'gently' bit.
'some carrots immersed' is the wordplay.
'some' indicates the answer is hidden within the clue (some parts of the word are used).
'SIMMERS' is hidden within 'carrots immersed'.
Can you help me to learn more?
(Other definitions for simmers that I've seen before include "bubbles" , "Cooks" .)
