Rue flat being taken thus and become lachrymose (7)
I believe the answer is:
tearful
'lachrymose' is the definition.
(I know that lachrymose can be written as tearful)
'rue flat being taken thus and' is the wordplay.
'rue flat' can be anagrammed to 'TEARFUL'.
However, I am unsure how the anagram is indicated.
'become' is the link.
Can you help me to learn more?
(Other definitions for tearful that I've seen before include "emotional" , "crying" , "visibly distressed" , "Visibly upset" , "Lachrymose, blubbering" .)