Bloomers went up a pole (5)
I believe the answer is:
roses
'bloomers' is the definition.
(I've seen this before)
'went up a pole' is the wordplay.
'went up' becomes 'rose' (I've seen this in another clue).
'a pole' becomes 's' (abbreviation for South, as in South Pole).
'rose'+'s'='ROSES'
(Other definitions for roses that I've seen before include "''They are not long, the days of wine and ...'' (Dowson)" , "Red, white war symbols" , "favours > certain wines" , "These flowers in one's cheeks usually denote health" , "chocolates" .)