Has it a slow wriggle? (6)
I believe the answer is:
gentle
'slow wriggle?' is the definition.
'gentle' can be an answer for 'slow' (thesaurus). I am not certain of the 'wriggle?' bit.
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for gentle that I've seen before include "that may help angler catch fish" , "Not stern, coarse or violent" , "Not violent, tender" , "amiable" , "Not harsh or violent" .)