You might sling one inverted comma in covers of hardback (7)
I believe the answer is:
hammock
'you might sling one' is the definition.
I can't tell whether this definition defines the answer.
'inverted comma in covers of hardback' is the wordplay.
'inverted' says the letters should be written in reverse.
'in' means one lot of letters goes inside another.
'covers of' says to hollow out the word (remove centre letters).
'hardback' with its centre removed is 'hk'.
'comma' written backwards gives 'ammoc'.
'ammoc' inserted into 'hk' is 'HAMMOCK'.
Can you help me to learn more?
(Other definitions for hammock that I've seen before include "Hanging cloth bed" , "Suspended recliner" , "Resting place slung under tree etc" , "Hanging bed of canvas or rope" , "A suspended canvas or rope bed" .)