Calls doctor to help with teen's dropping temperature (10)
I believe the answer is:
telephones
'calls' is the definition.
(I know this)
'doctor to help with teen's dropping temperature' is the wordplay.
'doctor' is an anagram indicator.
'with' says to put letters next to each other.
'dropping' suggests deleting specific letters.
'temperature' becomes 't' (abbreviation).
'to'+'help'='tohelp'
'tohelp' after 'teens' is 'teenstohelp'.
'teenstohelp' with 't' taken out is 'eenstohelp'.
'eenstohelp' anagrammed gives 'TELEPHONES'.
(Another definition for telephones that I've seen is " Calls".)