Esher development is quite transparent (5)
I believe the answer is:
sheer
'quite transparent' is the definition.
'sheer' can be an answer for 'transparent' (synonyms). I am unsure of the 'quite' bit.
'esher development' is the wordplay.
'development' is an anagram indicator.
'esher' with letters rearranged gives 'SHEER'.
'is' acts as a link.
Can you help me to learn more?
(Other definitions for sheer that I've seen before include "Absolute - precipitous" , "Very thin; unmitigated" , "needing to change a course" , "Transparently thin - very steep" , "Very thin as in ladies' stockings" .)