Like a drip, small and dry -- that's not right (5)
I believe the answer is:
weedy
'like a drip' is the definition.
'small and dry that's not right' is the wordplay.
'small' becomes 'wee' (Scottish term for small).
'and' is a charade indicator (letters next to each other).
'that's not' is a deletion indicator.
'right' becomes 'r' (common abbreviation).
'dry' with 'r' removed is 'dy'.
'wee'+'dy'='WEEDY'
(Other definitions for weedy that I've seen before include "like an untended flower bed?" , "Scraggy" , "quite unlike Charles Atlas" , "Skinny" , "Underdeveloped" .)