Give up making request for them to include dryer, perhaps (5,2,3,5)
I believe the answer is:
throw in the towel
'give up' is the definition.
(synonyms)
'request for them to include dryer perhaps' is the wordplay.
I cannot really understand how this works, but
'request' could be 'o' and 'o' is present in the answer.
'for' could be 'to' (eg both can mean 'in the opinion of') and 'to' is found in the answer.
This explanation may well be incorrect...
'making' is the link.
Can you help me to learn more?
(Other definitions for throw in the towel that I've seen before include "Cave in" , "charge nothing for additional item" , "damp condition suggests one might?" , "Make a concession" , "Withdraw" .)