Lass I love back in drilling gear (3,3)
I believe the answer is:
oil rig
'drilling gear' is the definition.
'oil rig' can be an answer for 'gear' (oil rig is a kind of gear). I am unsure of the 'drilling' bit.
'lass i love back' is the wordplay.
'lass' becomes 'girl' (lass can mean a young woman).
'love' becomes 'o' (love means zero in tennis).
'back' says the letters should be written in reverse.
'girl'+'i'+'o'='girlio'
'girlio' reversed gives 'OIL-RIG'.
'in' is the link.
Can you help me to learn more?
(Other definitions for oil rig that I've seen before include "Drilling edifice" , "Structure for drilling for viscous liquid" , "What may be boring" , "Fuel well" , "Well drilling plant" .)