Spurt out when you cut gently into it (6)
I believe the answer is:
splash
'spurt out when you' is the definition.
I can't judge whether this definition defines the answer.
'cut gently into it' is the wordplay.
'cut' becomes 'slash' (synonyms).
'gently' becomes 'p' (I've seen this in other clues).
'into it' means one lot of letters goes inside another.
'slash' enclosing 'p' is 'SPLASH'.
Can you help me to learn more?
(Other definitions for splash that I've seen before include "Big media display -- bellyflop effect" , "A Bigger --, Hockney painting" , "Bright patch of colour; cause water to fly" , "Make liquid fly around" , "Ostenatious display made by spatter of water" .)