To suggest that Lincoln's at Land's End, would be lying! (4)
I believe the answer is:
abed
'be lying' is the definition.
(lying abed or in bed)
'to suggest that lincoln's at land's end would' is the wordplay.
I cannot really see how this works, but
'would' could be 'd' (I've seen this in other clues) and 'd' is present in the answer.
'lincoln' could be 'abe' (I've seen this in another clue) and 'abe' is found in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for abed that I've seen before include "having a lie-in?" , "in retirement, possibly?" , "Yet to rise" , "laid up" , "at rest" .)