Kind of average temperature after spring (4-5)
I believe the answer is:
well-meant
'kind' is the definition.
(thesaurus)
'average temperature after spring' is the wordplay.
'average' becomes 'mean' (type of average).
'temperature' becomes 't' (abbreviation).
'after' means one lot of letters go next to another.
'spring' becomes 'well' (I've seen this before**).
'mean'+'t'='meant'
'meant' after 'well' is 'WELL-MEANT'.
'of' is the link.
(Other definitions for well-meant that I've seen before include "Kind" , "Done with good intentions but poor result" .)