Extended left side of pitch by manor-house
I believe the answer is:
long-range
'manor-house' is the definition.
I can't judge whether this defines the answer.
'extended left side of pitch by' is the wordplay.
'extended' becomes 'long' ('long' can be similar in meaning to 'extended').
'left side of pitch' becomes 'range' (I can't justify this - if you can you should believe this answer much more).
'by' says to put letters next to each other.
'long'+'range'='LONG-RANGE'
Can you help me to learn more?
(Other definitions for long-range that I've seen before include "Acting over a distance" , "Able to function at a great distance" , "(Of forecasts) relating to a time well into the future" , "Covering great distance, or looking further ahead" , "Acting over great distances" .)