Drop of vino - cracking remedy for wind (5)
I believe the answer is:
curve
'wind' is the definition.
(synonyms)
'drop of vino cracking remedy' is the wordplay.
'drop of' says to take the initial letters (the smallest possible amount of the word).
'cracking' means one lot of letters goes inside another (inserted letters go into a gap or crack).
'remedy' becomes 'cure' (synonyms).
The first letter of 'vino' is 'v'.
'v' inserted inside 'cure' is 'CURVE'.
'for' is the link.
(Other definitions for curve that I've seen before include "Non-straight line" , "small bulge" , "Line that's not straight" , "way of learning" , "Shape of 23 down" .)