Erect nice, new ways to express shyness (9)
I believe the answer is:
reticence
'shyness' is the definition.
(I've seen this before)
'erect nice new ways' is the wordplay.
'new ways' indicates anagramming the letters (I've seen 'new way' mean this).
'erect'+'nice'='erectnice'
'erectnice' with letters rearranged gives 'RETICENCE'.
'to express' acts as a link.
(Other definitions for reticence that I've seen before include "Restraint" , "Tendency to be reserved in communication" , "Unwillingness to talk" , "'Reserve, taciturnity (9)'" , "Tendency to hold back" .)