Shape, pattern (5)
I believe the answer is:
mould
This clue is a double definition.
'shape' is the first definition.
(I know that mould is a kind of shape)
'pattern' is the second definition.
(thesaurus)
(Other definitions for mould that I've seen before include "Must" , "Furry fungus" , "Guide or control the development of" , "Pattern for shaping - fungoid growth" , "Fungal growth; template" .)