Feel hosts order more than is reasonable (3,4)
I believe the answer is:
too much
'more than is reasonable' is the definition.
(I've seen this before)
'feel hosts order' is the wordplay.
'feel' becomes 'touch' (touching is a kind of feeling).
'hosts' indicates putting letters inside (inserted letters are welcomed or hosted).
'order' becomes 'om' (Order of Merit).
'touch' enclosing 'om' is 'TOO MUCH'.
(Other definitions for too much that I've seen before include "Excess, more than is needed" , "See 17" , "Beyond endurance" , "American expression of approval" , "Excessive, overwhelming" .)