Taking the first left, I would go behind cover (3)
I believe the answer is:
lid
'behind cover' is the definition.
'lid' can be an answer for 'cover' (I've seen this before). I am not sure about the 'behind' bit.
'taking the first left i would' is the wordplay.
'taking the first' suggests taking the first letters.
'i would' becomes 'I'd'.
The first letter of 'left' is 'l'.
'l'+'id'='LID'
'go' acts as a link.
Can you help me to learn more?
(Other definitions for lid that I've seen before include "Cover as for jar" , "Removable top" , "Pie crust; cover" , "Top or cover" , "Cover for box or pot" .)