Considerateness is delicious roaming around Thailand’s capital (10)
I believe the answer is:
solicitude
'considerateness' is the definition.
(thesaurus)
'delicious roaming around thailand's capital' is the wordplay.
'roaming' is an anagram indicator.
'around' indicates putting letters inside.
'capital' suggests taking the first letters.
The initial letter of 'thailand' is 't'.
'delicious' anagrammed gives 'soliciude'.
'soliciude' going around 't' is 'SOLICITUDE'.
'is' is the link.
(Other definitions for solicitude that I've seen before include "Feeling of excessive concern" , "Care, concern" .)