Toilet and shower cheer up English port (10)
I believe the answer is:
hartlepool
'english port' is the definition.
The definition suggests a singular noun which matches the answer.
'toilet and shower cheer up' is the wordplay.
'toilet' becomes 'loo' (loo can informally mean a toilet).
'and' says to put letters next to each other.
'shower' becomes 'pelt' (showers of rain may be said to pelt).
'cheer' becomes 'rah' (rah is a triumphant cry).
'up' says the letters should be written backwards (in down clue: letters go upwards).
'loo'+'pelt'+'rah'='loopeltrah'
'loopeltrah' back-to-front is 'HARTLEPOOL'.
Can you help me to learn more?
(Other definitions for hartlepool that I've seen before include "ultimately minor in the Apollo shot" , "Town in county Durham" .)