Alluring bottom right by monkey’s tail (4)
I believe the answer is:
sexy
'alluring' is the definition.
(I've seen this before)
'bottom right by monkey's tail' is the wordplay.
'bottom right' becomes 'SE' (South East).
'by' becomes 'x' (2 by 4 is 2 x 4).
'tail' indicates one should take the final letters.
The last letter of 'monkey' is 'y'.
'se'+'x'+'y'='SEXY'
(Other definitions for sexy that I've seen before include "Seductive" , "Exciting carnal desire" , "Titillating" , "Provocative" , "Exciting, attractive" .)