Tiny, small (6)
I believe the answer is:
little
I believe this is a double definition.
'tiny' is the first definition.
(similar in meaning)
'small' is the second definition.
(I know that small can be written as little)
(Other definitions for little that I've seen before include "Piddling" , "'A . . . . . . knowledge is a dangerous thing'" , "` `...... pitchers have big ears' '" , "Tell it (anag) - not a lot!" , "'...... pitchers have large ears'" .)