Tabloid's leader: article on good old dance (5)
I believe the answer is:
tango
'dance' is the definition.
(tangoing is a kind of dancing)
'tabloid's leader article on good old' is the wordplay.
'leader' suggests taking the first letters.
'article' becomes 'an' (indefinite article).
'on' means one lot of letters go next to another.
'good' becomes 'g' (abbreviation).
'old' becomes 'o' (common abbreviation eg in OE for Old English).
The initial letter of 'tabloids' is 't'.
't'+'an'+'g'+'o'='TANGO'
(Other definitions for tango that I've seen before include "South American dance (for two?)" , "Last - in Paris (film)" , "Colourful dance from Argentina" , "tee" , "Latin-American dance - code for T" .)