Conifer, solid, clipped (3)
I believe the answer is:
fir
'conifer' is the definition.
(fir is a kind of conifer)
'solid clipped' is the wordplay.
'solid' becomes 'firm' ('firm' can be a synonym of 'solid').
'clipped' means to remove the last letter.
'firm' with its final letter taken off is 'FIR'.
(Other definitions for fir that I've seen before include "Coniferous tree" , "Pine tree for Gaelic men?" , "wood" , "Tree for Irishmen" , "Evergreen tree for Irish men?" .)