Tiny dab, almost ridiculously small and neat (6)
I believe the answer is:
dainty
'neat' is the definition.
(thesaurus)
'tiny dab almost ridiculously' is the wordplay.
'almost' means to remove the last letter (most of the word but not all of it).
'ridiculously' indicates anagramming the letters.
'tiny'+'dab'='tinydab'
'tinydab' with its last letter taken off is 'tinyda'.
'tinyda' anagrammed gives 'DAINTY'.
'small and' acts as a link.
This may not be correct. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for dainty that I've seen before include "Fragile" , "Refined" , "Fine" , "Petite and elegant" , "Small and pretty, delicate" .)