Unadvisable to get rid of landaus or that's the vague feeling (4)
I believe the answer is:
vibe
'feeling' is the definition.
(I've seen this before)
'unadvisable to get rid of landaus' is the wordplay.
'to get rid of' indicates named letters should be taken away.
'unadvisable' with 'landaus' taken away is 'VIBE'.
'or that's the vague' is the link.
This may not be correct. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for vibe that I've seen before include "Aura given off by person/place" , "Aura experienced instinctively" , "Aura (colloq.)" , "in the air" , "Perceptible aura" .)