Manage to hide a second in the wood (5)
I believe the answer is:
copse
'wood' is the definition.
(I've seen this before)
'manage to hide a second' is the wordplay.
'manage' becomes 'cope' (synonyms).
'to hide' is an insertion indicator.
'a second' becomes 's' (common abbreviation).
'cope' placed around 's' is 'COPSE'.
'in the' is the link.
(Other definitions for copse that I've seen before include "Dense thicket of trees" , "Piece of managed woodland" , "spinney" , "Clump of small trees for regular cropping" , "Wood - thicket" .)