Singular gardeners seen here exposed patterned jumper perhaps (8)
I believe the answer is:
skewbald
'singular gardeners seen here exposed patterned jumper perhaps' is the definition.
The definition suggests a singular noun which matches the answer.
'singular gardeners seen here exposed' is the wordplay.
I cannot really see how this works, but
'singular' could be 's' (abbreviation sometimes used in dictionaries) and 's' is located in the answer.
'exposed' could be 'bald' (I've seen this before) and 'bald' is located in the answer.
The remaining letters 'kew' is a valid word which might be clued in a way I don't understand.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for skewbald that I've seen before include "(Horse) with white and coloured marks" , "maybe brown and white" , "Bicoloured creature" , "patchy" , "Marked with patches of white and a colour" .)