Straightens (6)
'straightens' is the definition.
(unbending is a kind of straightening)
This is the entire clue.
(Other definitions for unbends that I've seen before include "Becomes less formal - straightens up" , "Becomes relaxed or affable" , "Straightens back to become less formal" , "grows warmer" , "Relaxes from tension" .)
'straightens' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for aligns that I've seen before include "Arranges in a straight row" , "Arranges in signal" , "Joins forces" , "allies" , "Lines up" .)