Lad holds back cover for functions that keep us going (6)
I believe the answer is:
bodily
'functions that keep us going' is the definition.
The definition and answer are not the same part of speech.
'lad holds back cover' is the wordplay.
'lad' becomes 'boy' (lad means a young boy).
'holds' means one lot of letters goes inside another.
'back cover' becomes 'dil' (I can't explain this - if you can you should give a lot more credence to this answer).
'boy' going around 'dil' is 'BODILY'.
'for' is the link.
Can you help me to learn more?
(Other definitions for bodily that I've seen before include "Corporeal" , "Corporal" , "altogether" , "Of the human physique, like the b in crime of gbh" , "Material, physical" .)