Young woman hiding in the glasswork section (4)
I believe the answer is:
lass
'young woman' is the definition.
(informal term for a young woman)
'hiding in the glasswork section' is the wordplay.
'hiding in' indicates the central letters.
'the glasswork' becomes 'glass' (glass is a kind of glasswork).
'section' becomes 's' (legal abbreviation).
The centre of 'glass' is 'las'.
'las'+'s'='LASS'
(Other definitions for lass that I've seen before include "Damsel" , "Sweet resident of Richmond Hill?" , "Miss" , "Familiar form of address for female" , "Young woman (-. Eng.)" .)