Patter of light rain in Manchester town? Check (5,5)
I believe the answer is:
sales pitch
'patter' is the definition.
(I've seen this in another clue)
'light rain in manchester town? check' is the wordplay.
'light rain' becomes 'spit' (I've seen this before).
'in' is an insertion indicator.
'manchester town?' becomes 'sale' (I can't justify this - if you can you should give a lot more credence to this answer).
'check' becomes 'ch' (abbreviation).
'sale'+'ch'='salech'
'spit' placed into 'salech' is 'SALES PITCH'.
'of' is the link.
Can you help me to learn more?
(Other definitions for sales pitch that I've seen before include "Market stall" , "bid to make one part with money" , "Spiel; patter" , "talk of flogging" , "Vendor's spiel" .)
