Hoe the tiny dandelions first (4)
I believe the answer is:
weed
'hoe' is the definition.
(thesaurus)
'the tiny dandelions first' is the wordplay.
'the tiny' becomes 'wee' (I've seen this before).
'first' indicates taking the first letters.
The first letter of 'dandelions' is 'd'.
'wee'+'d'='WEED'
(Other definitions for weed that I've seen before include "Wild unwanted plant - tobacco?" , "Useless plant - useless person" , "pot" , "Hoe to remove it" , "nuisance in bed" .)