Nothing, for example, on directions for colour (4,5)
I believe the answer is:
nile green
'for colour' is the definition.
(I've seen this before)
'nothing for example on directions' is the wordplay.
'nothing' becomes 'nil' (eg nil is zero in football).
'for example' becomes 'eg' (short for 'exempli gratia', 'for example' in Latin).
'on' becomes 're' ('on' can be mean 'with reference to').
'directions' becomes 'en' (east and north).
'nil'+'eg'+'re'+'en'='NILE GREEN'
(Other definitions for nile green that I've seen before include "Pale shade" , "Pale colour" .)