Crisscross pattern (7)
I believe the answer is:
lattice
'crisscross pattern' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for lattice that I've seen before include "Framework in diagonal pattern" , "Crystal structure" , "Arrangement with bars" , "Trellis: maybe" , "Framework of crossed laths or bars" .)