The cost can include lb50 notes, one gathers (8)
I believe the answer is:
collects
'one gathers' is the definition.
(I've seen this before)
'the cost can include lb50 notes' is the wordplay.
I cannot really see how this works, but
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is found in the answer.
'notes' could be 'ec' and 'ec' is located in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for collects that I've seen before include "prayers" , "Gets or gathers together" , "Accumulates, collates" , "Assembles" .)